How is “little by little” used?

In Fight Club (1999), one line is: “Little by little, you're just letting yourself become...”

Which movie is “little by little” from?

The clip at the top of this page is from Fight Club (1999).

Little by little, you're just letting yourself become...

7 作品で登場 · 1 本目

slowly; gradually

7 本の映画に登場

オックスフォード映画の 100%
slowly; gradually
but he's doing it little by little, so she doesn't know it and she goes crazy, and she kills herself.
Little by little, you're just letting yourself become...

定義：Oxford Advanced Learner's Dictionary 第 9 版