The freauency of waves is given in:

A. nodes per second

B. graphs

C. waves per second

D. cycles per second

Given this definition, it is reasonable that the quantity frequency would have units of cycles/second, waves/second, vibrations/second, or something/second. Another unit for frequency is the Hertz (abbreviated Hz) where 1 Hz is equivalent to 1 cycle/second.

D.) Cycles per second