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barely hardly infrequently seldom

almost never extra extraordinarily extremely finely hardly ever little notably now and then on rare occasions once in a while once in blue moon remarkably scarcely ever singularly uncommon uncommonly unfrequently unusually

frequently regularly

a few times hardly occasionally rarely scarcely sometimes sporadically

every now and then from time to time hardly ever in a few cases inhabitually irregularly little not often not very often on and off once in a blue moon once in a while scarcely ever semioccasionally uncommonly unusually whimsically

frequently regularly

often usually