We explain what a frequency is and how to measure this magnitude. Also, the different meanings of this term.

## What is frequency?

The **frequency** It is a magnitude that measures the number of repetitions that an event can have per unit of time.

The SI (International System of Units), which is the system of units used by most countries in the world, says that **frequency must be measured using hertz** (Hz).

A hertz is the frequency of a periodic event whose repetition occurs once per second, this unit also understood as cycle per second (cps). The hertz derivation is given in honor of the physicist Heinrich Rudolf Hertz.

But there is not only the hertz as a unit of frequency measurement. There are also other units such as revolutions per minute (rpm); beats per minute (bpm), used rather to measure heartbeats and musical tempo; and radians per second (rad/s)

Within the field of telecommunications, frequency is used **to establish the bands through which each station broadcasts**.

In** statistics** Instead, it is called *frequency* the number of components included within an interval, with a specific distribution.

See also: Pulse