There is some beautiful literary styles that thrive on the repeated use of words and phrases. The language is poetic and beautiful. This, however, is not an article that encourages the use of repeated words.
Unless you are writing in a style that demands the use of repetition it may be in your best interest to read through your text and determine if a word or phrase is overused.
Example:
Bad
The purpose of this exercise is to find the purpose of the repeated use of a word and then purpose not to use that word so much.
Good
The purpose of this exercise is to discover the objective of the repeated use of a word. After which you resolve not to use that word continually.
Both sentences said the exact same thing, but one was infused with different, but related words that allowed a more readable flow.
Many writers work on a first draft by simply attempting to lay down the ideas in a coherent fashion. It is only after they toil through their first draft that they begin to notice a repetition of phrases or words.
Many writers utilize a tool that provides a benefit in saying something a more unique fashion that device is a...