What is frequency?

Frequency is the rate at which something occurs or is repeated over a particular period of time. The rate of frequency is most often measured in cycles per second or Hertz.

60 cycles per second are the same as 60 Hertz. A thousand Hertz is often referred to as a Kilohertz (kHz).

Frequency can also be measured in time where the duration of a given cycle is equal to its frequency; where a thousandth of a second is stated as a millisecond. One millisecond equals a Kilohertz. An example: Frequency describes the number of waves that pass a fixed place in a given amount of time.

So for the time it takes for a wave to pass is half a second. Then the frequency is 2 per second or 2 Hertz. If two hundred and forty (240) waves pass in an hour, the frequency is 4 Hertz. The faster the cycle repeats, the higher the frequency.