Frequency

noun

1. The rate of occurrence of anything; the relationship between incidence and time period.

   "The frequency of bus service has been improved from one every 15 to one every 12 minutes."

2. The property of occurring often rather than infrequently.

   "The FAQ addresses questions that come up with some frequency."

3. The quotient of the number of times n a periodic phenomenon occurs over the time t in which it occurs: f = n / t.

   "Broadcasting live at a frequency of 98.3 megahertz, we’re your rock alternative!"

4. Number of times an event occurred in an experiment (absolute frequency)