Repetition (noun)

1. The act of doing, performing, or producing something again.
2. The repetition of words or phrases in speech or writing.
3. The repetition of an act or event.
4. A thing that has been repeated or repeated.

Origin:

Late 16th century, from french répétition, from latin repetitio(n-), from repetere "do again".

Examples:

1. The repetition of the task was frustrating for him.
2. Her speech was full of repetition.
3. The repetition of the experiment produced the same results.
4. The repetition of the same melody was boring.
5. He found the repetition of the same ideas in different books to be tedious.