Meaning

verb do one's shopping at; do business with; be a customer or client of

verb be a regular or frequent visitor to a certain place

adjective coming at short intervals or habitually

originFrom Old French frequent, from Latin frequens (“crowded, crammed, frequent, repeated, etc.”), possibly from a Proto-Indo-European *bʰrekʷ- (“to cram together”).

Etymology from Wiktionary, CC BY-SA 3.0