Little by little and One time

Little by little adverb - By small steps or amounts.

One time and little by little are semantically related In some cases you can replace phrase "One time" with "Little by little", this phrases are similar.

One time adverb - On one occasion.

Little by little and one time are semantically related in one at a time topic. Sometimes you can use "Little by little" instead an adverb phrase "One time".