1) Intermittently 2) Irregularly 3) Not many times 4) Rarely 5) Seldom 6) Sporadically 1) Little 2) Once in a blue moon 3) Seldom 4) Uncommonly 
• (adv.) Not frequently; rarely.
In·fre'quent·ly adverb Not frequently; rarely. 
[adv] - not many times
adverb not many times; `in your 1850 church you not infrequently find a dramatic contrast between the sumptuous appointments of the building itself and the inhuman barrack-like living conditions in the church room`
not many times