frequency

(frēˈkwən-sē)

1. The property or condition of occurring at frequent intervals.
2. Mathematics & Physics The number of times a specified periodic phenomenon occurs within a specified interval, as:
   a. The number of repetitions of a complete sequence of values of a periodic function per unit variation of an independent variable.
   b. The number of complete cycles of a periodic process occurring per unit time.
   c. The number of repetitions per unit time of a complete waveform, as of an electric current.
3. Statistics
   a. The number of measurements in an interval of a frequency distribution.
   b. The ratio of the number of times an event occurs in a series of trials of a chance experiment to the number of trials of the experiment performed.