FACTOID # 87: 22% of American women aged 20 gave birth while in their teens. In Switzerland and Japan, only 2% did so.
 
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Encyclopedia > Letter frequencies

The frequency of letters in text has often been studied for use in cryptography, and frequency analysis in particular. No exact letter frequency distribution underlies a given language, since all writers write slightly differently. Linotype machines sorted the letters' frequencies as etaoin shrdlu cmfwyp vbgkqj xz based on the experience and custom of manual compositors. Likewise, Modern International Morse code encodes the most frequent letters with the shortest symbols; arranging the Morse alphabet into groups of letters that require equal amounts of time to transmit, and then sorting these groups in increasing order, yields e it san hurdm wgvlfbk opjxcz yq. Similar ideas are used in modern data-compression techniques such as Huffman coding. The German Lorenz cipher machine, used in World War II for encryption of very high-level general staff messages Cryptography (or cryptology; derived from Greek κρυπτός kryptós hidden, and the verb γράφω gráfo write or λεγειν legein to speak) is the study of message secrecy. ... In mathematics, physics and signal processing, frequency analysis is a method to decompose a function, wave, or signal into its frequency components so that it is possible to have the frequency spectrum. ... Linotype (Deutsches Museum) In the printing industry, the Linotype machine, pronounced Line-O-Type, []) uses a keyboard consisting of 91 keys to create an entire line of metal type at once, hence a line of type. ... // ETAOIN SHRDLU (often pronounced et-ee-oin shurd-loo) is the approximate order of frequency of the twelve most commonly used letters in the English language, best known as a nonsense phrase that sometimes appeared in print in the days of hot type publishing due to a custom of Linotype... 1922 Chart of the Morse Code Letters and Numerals Morse code is a method for transmitting telegraphic information, using standardized sequences of short and long elements to represent the letters, numerals, punctuation and special characters of a message. ... In computer science and information theory, Huffman coding is an entropy encoding algorithm used for lossless data compression. ...


More recent analyses show that letter frequencies, like word frequencies, tend to vary, both by writer and by subject. One cannot write an essay about x-rays without using frequent Xs, and different authors have habits which can be reflected in their use of letters.


Everyone writes differently – for example, Hemingway's writing style is visibly different from Faulkner's. Letter, bigram, trigram, word frequencies, word length, and sentence length can be calculated for specific authors, and used to prove or disprove authorship of texts, even for authors whose styles aren't so divergent. Ernest Miller Hemingway (July 21, 1899 — July 2, 1961) was an American novelist, short-story writer, and journalist. ... William Cuthbert Faulkner (born William Falkner), (September 25, 1897–July 6, 1962) was an American author. ... Bigrams are groups of two written letters, two syllables, or two words, and are very commonly used as the basis for simple statistical analysis of text; one of the most successful language models for Speech Recognition (Collins, 1996). ... It has been suggested that bigram be merged into this article or section. ...


Accurate average letter frequencies can only be gleaned by analyzing a large amount of representative text. With the availability of modern computing and collections of large text corpora, such calculations are easily made. Corpus linguistics is the study of language as expressed in samples (corpora) or real world text. ...

Contents

Relative frequencies of letters in the English language

Relative frequencies of letters in text.
Relative frequencies ordered by frequency.
Letter Frequency
a 8.167%
b 1.492%
c 2.782%
d 4.253%
e 12.702%
f 2.228%
g 2.015%
h 6.094%
i 6.966%
j 0.153%
k 0.772%
l 4.025%
m 2.406%
n 6.749%
o 7.507%
p 1.929%
q 0.095%
r 5.987%
s 6.327%
t 9.056%
u 2.758%
v 0.978%
w 2.360%
x 0.150%
y 1.974%
z 0.074%

[1] English single letter frequencies. ... English single letter frequencies. ... Image File history File links English-slf2. ... Image File history File links English-slf2. ...


Relative frequencies of letters in other languages

Spanish letter frequencies
Letter French [2] German [3] Spanish [4] Esperanto [5] Italian[6] Turkish
a 7.636% 6.51% 12.53% 12.12% 11.74% 11.68%
b 0.901% 1.89% 1.42% 0.98% 0.92% 2.95%
c 3.260% 3.06% 4.68% 0.78% 4.5% 0.97%
d 3.669% 5.08% 5.86% 3.04% 3.73% 4.87%
e 14.715% 17.40% 13.68% 8.99% 11.79% 9.01%
f 1.066% 1.66% 0.69% 1.03% 0.95% 0.44%
g 0.866% 3.01% 1.01% 1.17% 1.64% 1.34%
h 0.737% 4.76% 0.70% 0.38% 1.54% 1.14%
i 7.529% 7.55% 6.25% 10.01% 11.28% 8.27%*
j 0.545% 0.27% 0.44% 3.50% 0.00% 0.01%
k 0.049% 1.21% 0.00% 4.16% 0.00% 4.71%
l 5.456% 3.44% 4.97% 6.14% 6.51% 5.75%
m 2.968% 2.53% 3.15% 2.99% 2.51% 3.74%
n 7.095% 9.78% 6.71% 7.96% 6.88% 7.23%
o 5.378% 2.51% 8.68% 8.78% 9.83% 2.45%
p 3.021% 0.79% 2.51% 2.74% 3.05% 0.79%
q 1.362% 0.02% 0.88% 0.00% 0.51% 0
r 6.553% 7.00% 6.87% 5.91% 6.37% 6.95%
s 7.948% 7.27% 7.98% 6.09% 4.98% 2.95%
t 7.244% 6.15% 4.63% 5.27% 5.62% 3.09%
u 6.311% 4.35% 3.93% 3.18% 3.01% 3.43%
v 1.628% 0.67% 0.90% 1.90% 2.10% 0.98%
w 0.114% 1.89% 0.02% 0.00% 0.00% 0
x 0.387% 0.03% 0.22% 0.00% 0.00% 0
y 0.308% 0.04% 0.90% 0.00% 0.00% 3.37%
z 0.136% 1.13% 0.52% 0.50% 0.49% 1.50%
œ 0.018% 0 0 0 0 0
ß 0 0.31% 0 0 0 0
à 0.486% 0 0 0 see a 0
ç 0.085% 0 0 0 0 1.26%
ĉ 0 0 0 0.66% 0 0
è 0.271% 0 0 0 see e 0
é 1.904% 0 0 0 see e 0
ê 0.225% 0 0 0 0 0
ë 0.000% 0 0 0 0 0
ĝ 0 0 0 0.69% 0 0
ğ 0 0 0 0 0 1.13%
ĥ 0 0 0 0.02% 0 0
î 0.045% 0 0 0 0 0
ì 0 0 0 0 see i 0
ï 0.005% 0 0 0 0 0
i 0 0 0 0 0 5.20%*
ĵ 0 0 0 0.12% 0 0
ñ 0 0 0.03 0 0 0
ò 0 0 0 0 see o 0
ö 0 0 0 0 0 0.87%
ŝ 0 0 0 0.38% 0 0
ş 0 0 0 0 0 1.94%
ù 0.058% 0 0 0 see u 0
ŭ 0 0 0 0.52% 0 0
ü 0 0 0 0 0 1.99%

-*See Turkish dotted and dotless I Esperanto flag Esperanto is a constructed international auxiliary language. ... Two distinct versions of the letter I, dotted and dotless, are used in the Turkish alphabet, which is a variant of the Latin alphabet. ...


See also

Corpus linguistics is the study of language as expressed in samples (corpora) or real world text. ... // ETAOIN SHRDLU (often pronounced et-ee-oin shurd-loo) is the approximate order of frequency of the twelve most commonly used letters in the English language, best known as a nonsense phrase that sometimes appeared in print in the days of hot type publishing due to a custom of Linotype... A typical distribution of letters in English language text. ... Linotype (Deutsches Museum) In the printing industry, the Linotype machine, pronounced Line-O-Type, []) uses a keyboard consisting of 91 keys to create an entire line of metal type at once, hence a line of type. ... The list below of most common words in English, like any superlative list, cannot be definitive. ... The verb to scrabble also means to scratch, scramble or scrape about: see Wiktionary:scrabble. ...

References

  1. ^ English letter frequencies
  2. ^ CorpusDeThomasTempé. Retrieved on 2007-06-15.
  3. ^ Albrecht Beutelspacher, Kryptologie, 7. Aufl., Wiesbaden: Vieweg Verlagsgesellschaft, 2005, ISBN 3-8348-0014-7, p.10
  4. ^ Fletcher Pratt, Secret and Urgent: the Story of Codes and Ciphers Blue Ribbon Books, 1939, pp. 254-255.
  5. ^ La Oftecoj de la Esperantaj Literoj. Retrieved on 2007-09-14.
  6. ^ Simon Singh, Codici e Segreti, 1999, RCS, ISBN 88-17-12539-3

Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 166th day of the year (167th in leap years) in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... is the 257th day of the year (258th in leap years) in the Gregorian calendar. ...

External links


  Results from FactBites:
 
Fun With Words: Letter Frequencies (318 words)
When analyzing the frequency with which letters appear in English, it's important to understand whether you are factoring in the frequency with which individual words are used.
For example, the letter 'h' is not found in a comparatively large number of English words, but as it appears in several of the most commonly used words, such as "the," "then," "there," and "that," it appears more often in every day speech and writing than it does in a list of dictionary words.
The first table shows the frequency of letters as they appear in 18584 base words -- no plural words or words with common suffixes are included in the list.
Letter frequencies - Wikipedia, the free encyclopedia (260 words)
The frequency of letters in text messages has often been studied for use in cryptography, and frequency analysis in particular.
Letter frequencies, like word frequencies, tend to vary, both by writer and by subject.
Letter, bigram, trigraph and word frequencies can be used to prove or disprove authorship of long texts.
  More results at FactBites »


 

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