High Quality Content by WIKIPEDIA articles! The Rhythmic Airplay Chart (often also called Rhythmic Top 40 or CHR/Rhythmic chart) is an airplay chart that is featured weekly in Billboard Magazine. The chart tracks and measures the airplay of songs played on Rhythmic stations, whose playlist includes mostly hit-driven R B/Hip-Hop, Rhythmic pop, and some Dance tracks. Arbitron sometimes refers to the format as Rhythmic Contemporary Hit Radio.