English

isofrequency

From iso- + frequency.

Ancient Greek ἴσος ‘equal’

English iso-

Proto-Italic *frekʷents

Latin frequens ‘crowded, crammed, packed’

Latin frequentia ‘crowd, multitude, throng’

Today it means

adj Describing points or systems having the same frequency

Language periods are conventional ranges, not dates for this word.

Etymograph / isofrequency