Frequency is defined as the measure of the number of occurrences of a repeating
event per unit time. To calculate the frequency, the number of occurrences of
the event within a fixed time interval are counted, and then it's divided by
the length of the time interval. Ex: 1 Hz means that an event repeats once per
second, 2 Hz is twice per second.
Frequency calculation formula is :
Frequency = 1 / Time
Frequency unit in SI system is Hertz (Hz). Other frequency units such as
kilohertz (khz), megahertz (mhz), gigahertz (ghz) are widely used.