Frequency is a measure of how often something happens in a given period of time.

The dimension of frequency is 1/Time.

Here's why:

* Frequency is usually measured in Hertz (Hz).

* Hertz is defined as cycles per second.

* Cycles are just a count of repetitions, which are dimensionless.

* Second is a unit of time.

Therefore, the dimension of frequency is:

* Cycles / Second = 1 / Second = 1 / Time

Examples:

* Frequency of a sound wave: 440 Hz means the wave oscillates 440 times per second.

* Frequency of a light wave: 500 THz means the wave oscillates 500 trillion times per second.

Key takeaway: Frequency is essentially the reciprocal of time. It tells you how many events occur within a given time period.