Adjektive
intermittent [ more intermittent ; most intermittent ]
sporadic [ more sporadic ; most sporadic ]
spotty [ spottier ; spottiest]
desultory [ more desultory ; most desultory]
spasmodic [ more spasmodic ; most spasmodic ]
bursty [ burstier ; burstiest ]
abrupt [ more abrupt/abrupter ; most abrupt/abruptest ]
excursive [ more excursive ; most excursive]