Question

what is the frequency

Answer 1

1) the rate at which something occurs over a particular period of time or in a given sample.

2) the rate per second of a vibration constituting a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light).

Answer 2

If you are looking at the moving wave , then the number of complete cycles it does in 1 second is what we called frequency