Little by little; gradually; a bit at a time—used to describe gradual progress or doing something in small increments.
毎朝ちょっとずつ単語を覚えれば、半年でかなり語彙が増える。
If you learn a few words every morning, your vocabulary will increase considerably in six months.
引っ越しの荷物はちょっとずつ片づけていくつもりだ。
I plan to pack up the moving boxes little by little.
貯金はちょっとずつでも続けることが大事だ。
Saving a little at a time is important as long as you keep it up.