little by little, gradually, a little at a time, in small amounts
Его французский понемногу становится лучше.
His French is gradually improving.
I'm learning English little by little.
Давай чтоб хватило, понемногу, ок?
Let’s make it last by taking a little at a time, okay?
— Славные парни (1990)
He is getting better little by little.
The sky is gradually clearing.