audio frequency, audio - an audible acoustic wave frequency

radio frequency - an electromagnetic wave frequency between audio and infrared

infrared, infrared frequency - the infrared part of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range; "they could sense radiation in the infrared"

wave number - the reciprocal of the wavelength of a wave

count per minute, counts/minute - frequency per minute

sampling frequency - (telecommunication) the frequency of sampling a continuously varying signal

rate - a magnitude or frequency relative to a time unit; "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected"

ratio - the relative magnitudes of two quantities (usually expressed as a quotient)

incidence, relative incidence - the relative frequency of occurrence of something

cardinal number, cardinal - the number of elements in a mathematical set; denotes a quantity but not the order