Source : Webster's Revised Unabridged Dictionary (1913)

Frequently \Fre*quent*ly\, adv.
   At frequent or short intervals; many times; often;
   repeatedly; commonly.

Source : WordNet®

frequently
     adv : many times at short intervals; "we often met over a cup of
           coffee" [syn: {often}, {oftentimes}, {oft}, {ofttimes}]
           [ant: {rarely}, {infrequently}]