The phrase "in driblets" implies something happening in small or sporadic amounts. Synonyms for this phrase include "bit by bit," "piece by piece," "sporadically," "intermittently," "gradually," and "occasionally." Each of these words or phrases convey the idea of something happening in small or infrequent increments. Other synonyms for "in driblets" include "by degrees," "little by little," "step by step," and "slowly but surely." Using any of these phrases to describe something that is happening in small amounts can help clarify the intent of the sentence and convey the writer's intended tone and meaning.