frequen-, frequent-

(Latin: crowded, numerous; repeated, repetition, constant)

audio frequency, audio-frequency (s) (noun); audio frequencies; audio-frequencies (pl)
A sound frequency between 20 and 20,000 cycles per second, or hertz: Audio frequency refers to the frequency of oscillation able to be detected by the ear of a human.

Audio-frequencies are those of electrical, sound, or other wave vibrations coming within the range of normal human hearing.

frequence
frequency (s), frequencies (pl)
frequent
frequentable (adjective), more frequentable,most frequentable
Possible of being accessible or easily approached: The entrance to the bank is quite frequentable by using the few steps, ramp, and the door which opens automatically when the big button is pressed.
frequentation
frequentative
frequentative
frequenter
frequently
frequentness
infrequency
infrequent
infrequently