The number of times a repeated event occurs in one unit of time is called frequency.
The unit of frequency is Hertz. It is represented by the sign “Hz.”
is equivalent to one cycle or oscillation of a wave per second.
It is named after Heinrich Rudolf Hertz, a German scientist. He was the first to provide compelling evidence for the existence of electromagnetic radiation as well as electromagnetic waves.
The SI base unit of the Hertz is or .
Therefore, hertz is the derived unit of frequency.