Question

Radio stations identify themselves by their position on the radio dial such as 90.1 and 93.3. This number is based on the number of waves or cycles that pass a fixed point in a specific unit of time. To which property of a wave does this identification number refer?

Answer 1

This identification number refers to the FREQUENCY of
the radio waves that each station transmits from its tower.

The numbers mentioned in the question are the numbers
of MEGAHERTZ ... millions of that station's waves that
are sent out from an FM station and pass you every second.