frequent (adj.) Look up frequent at Dictionary.com
mid-15c., "ample, profuse," from Middle French frequent, or directly from Latin frequentem (nominative frequens) "crowded, repeated," of uncertain origin. Meaning "common, usual" is from 1530s; that of "happening at short intervals, often recurring" is from c.1600.
frequent (v.) Look up frequent at Dictionary.com
late 15c., from Middle French frequenter, from Latin frequentare "visit regularly," from frequentem (see frequent (adj.)). Related: Frequented; frequenting.