Answer: frequency

AnswerCrossword Clue
FREQUENCYPart of FM.
frequencyThe rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second
frequencycommonness of recurrence also FREQUENCE
frequencyThe particular waveband at which a radio station or other system broadcasts or transmits signals
frequencyThe fact of being frequent or happening often
frequencyThe ratio of the number of actual to possible occurrences of an event
frequencyThe (relative) number of times something occurs in a given sample
frequencyThe rate at which something occurs or is repeated over a particular period of time or in a given sample