Diacope

Diacope is a rhetorical term for a word or group of words that are repeated more than once in sentence separated by anything from one to a few words.

Example: "Put out the light, and then put out the light." (Othello in William Shakespeare's Othello, the Moor of Venice V.ii)


http://grammar.about.com/od/d/g/diacopeterm.htm