What is primarily measured by frequency in terms of waves?

Frequency is primarily defined as the number of occurrences of a repeating event per unit of time, which in the context of waves translates to the number of complete wave cycles that pass a given point in one second. When we talk about wave count, we are specifically referring to the objective measure of how many waves, or cycles, are produced within a certain timeframe, typically expressed in hertz (Hz).

Therefore, selecting wave count as the answer indicates an understanding of frequency as it directly correlates to how frequently the waves occur, rather than measuring characteristics like amplitude, speed, or time separately. Amplitude relates to the height or intensity of the wave, speed refers to how fast the wave travels, and time, while it can be related to frequency, does not capture the direct concept of counting wave cycles within that timeframe.