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20 points
FREQUENT is validvalid
occurring again and again [adj FREQUENTER, FREQUENTEST] : FREQUENCY [n], FREQUENTLY [adv], FREQUENTNESS [n] / to be in or at often [v FREQUENTED, FREQUENTING, FREQUENTS]
to go to habitually [v -ED, -ING, -S] / occurring often [adj FREQUENTER, FREQUENTEST, FREQUENTLY]