in dribs and drabs
US /ɪn drɪbz ænd dræbz/
UK /ɪn drɪbz ænd dræbz/

1.
aos poucos, em pequenas quantidades, esporadicamente
in small amounts or numbers at irregular intervals
:
•
The donations came in dribs and drabs, making it hard to reach the target.
As doações chegaram aos poucos, dificultando o alcance da meta.
•
The audience arrived in dribs and drabs, so the show started late.
A plateia chegou aos poucos, então o show começou tarde.