Repetition is the workhorse of Working Short-term Memory.

College students use Working Short Term memory and repetition by design to learn lists of facts. They may make a deck of study cards and run through them many times.

Small children use it by serendipity to learn vocabulary and grammatical rules. They will ask their parents to read a book to them over and over and over again.

Here, in the Notes below, is a further discussion of both sensory and working memory.