Synonyms for Frequently:

adv.

all (adverb)
often, oftentimes, ofttimes, oft.
commonly, repeatedly (adverb)
oftentimes, oft, ordinarily, intermittently, regularly, recurrently, in many instances, ofttimes, again and again, over and over, customarily, periodically, usually, spasmodically, many a time, often, many times, time and again, at times, habitually, not infrequently, successively, generally, every now and then.
frequently (adverb)
Prevalently, repeatedly.
habitually (adverb)
habitually.
regularly (adverb)
normally, recurrently, Prevailingly, Familiarly, regularly, rhythmically, predominately, continually, conventionally, periodically, constantly, generally, traditionally, steadily, ordinarily, cyclically, universally, monotonously, usually, commonly, habitually, Canonically, routinely, chronically, customarily.
repeatedly (adverb)
time after time, again and again.

adv

for the most part (adverb)
usually.
frequently (adverb)
recurrently, habitually, commonly, Prevalently, repeatedly, usually.
mostly (adverb)
many times, in many instances.
over and over again (adverb)
repeatedly.
recurrently (adverb)
regularly, recurrently, periodically, cyclically, rhythmically.
regularly (adverb)
normally, recurrently, Prevailingly, Familiarly, regularly, rhythmically, predominately, continually, conventionally, periodically, constantly, generally, traditionally, steadily, ordinarily, cyclically, universally, monotonously, usually, commonly, habitually, Canonically, routinely, chronically, customarily.
repeatedly (adverb)
ofttimes, time and again, many a time, oftentimes.

n.

continual, common, all the time, perpetual, frequent. consistently, as usual, big, usual, per usual, typically, naturally. frequently (noun)
often, oftentimes, ofttimes, oft.
often (noun)
more often than not, again and again, many a time, time and again, persistently, time after time, more times than you can shake a stick at, often enough, spasmodically, at times, a lot, over and over, many times, intermittently, not infrequently, every now and then, in many instances, every time one turns around, successively, perpetually.

Other synonyms:

frequent, continual, consistently, typically, perpetual. naturally, common. from time to time
every now and then.
often
time and again, often.
Other relevant words:
often, naturally, successively, again and again, persistently, common, intermittently, time after time, big, typically, many a time, in many instances, usual, not infrequently, spasmodically, over and over, perpetual, oft, as usual, oftentimes, continual, a lot, ofttimes, frequent, many times, perpetually, per usual, often enough, time and again, consistently.

Usage examples for frequently

  1. Frequently he took his book to the Duke home and read aloud to Carlia. – Dorian by Nephi Anderson
  2. I frequently could hear two or three at once. – The Bark Covered House or, Back in the Woods Again by William Nowlin