In radio broadcasting, a spin is a single play of a song. The term is also used as a unit to measure (or induce) popularity, typically in spins per week. This measure is also known as rotation, and is most heavily used at Top 40 radio stations and others with descendant radio formats. A song in light rotation is typically aired 5–15 times per week, while a medium rotation tune goes over the airwaves 10–25 times per week. Favored songs in heavy rotation start at 20 or more spins each week, perhaps reaching to fifty and beyond. This results in several spins each day, resulting in a high level of repetition for listeners who tune in for more than just a short amount of time. Note: broadcasting is also the old term for hand sowing. ... This page is about musical songs. ... Measurement is the determination of the size or magnitude of something. ... A person, action, decision or thing becomes popular if many people like or use that entity/object. ... A week is a unit of time longer than a day and shorter than a month. ... Top 40 is a radio format based on frequent repetition of songs from a constantly-updated list of the forty best-selling singles. ... A radio station is a site configured for broadcasting sound. ... A radio format or programming format describes the overall content broadcast on a radio station. ...