Question

which sound wave features are being described?
\frac{number of wavelengths}{time}
\frac{distance traveled}{time}

Explanation:

The ratio of the number of wavelengths to time is the frequency of a wave, which measures how often a wave repeats in a given time - period. The ratio of distance traveled to time is the speed of the wave, which indicates how fast the wave is moving through a medium.

Answer:

Frequency
Speed