The number of waves produced per second is called frequency.

Here's a breakdown:

* Wave: A disturbance that travels through a medium or space, transferring energy without transferring matter.

* Frequency: The number of wave cycles (complete oscillations) that pass a fixed point in one second. It's measured in Hertz (Hz).

Example: If a wave completes 10 cycles in one second, its frequency is 10 Hz.