1) A good deal 2) Continually 3) Oft 4) Often 5) Oftentimes 6) Ofttimes 7) Repeatedly 8) Usually 1) Again and again 2) At short intervals 3) Commonly 4) Constantly 5) Continually 6) Habitually 7) Many times 8) Many times at short intervals 9) Often 10) Oftentimes 11) Ofttimes 12) On a regular basis 13) Over and over again 14) Recurrently 15) Regularly 16) Repeatedly 17) Repetitively 18) Time after time 
• (adv.) At frequent or short intervals; many times; often; repeatedly; commonly.
Fre·quent·ly adverb At frequent or short intervals; many times; often; repeatedly; commonly. 
[adv] - many times at short intervals
often adverb many times at short intervals; `we often met over a cup of coffee`
often; many times; at short intervals.
many times at short intervals