25 synonyms for frequently such as commonly, again and again, and all the time. Frequently is an adverb, and its antonyms are rarely and infrequently.
Again and again, all the time, commonly, constantly, continually, customarily, habitually, lots of times, many a time, many times, normally, oft, oft-times, often, oftentimes, on several occasions, over and over again, recurrently, regularly, repeatedly, routinely, time and again, usually, and very often.