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.