Duplicate Phrase Detector

A single repeated word is easy to spot on a re-read, but a repeated phrase, three or four words used together more than once, tends to blend into the background of a longer piece of writing since each individual occurrence reads fine on its own and only the pattern across the whole document reveals the repetition. This tool scans a text block specifically for repeated phrases and multi-word patterns, not just single words, flagging where the same phrase shows up more than once throughout a document. Useful for catching a phrase that got reused without noticing across a long report, tightening a draft that leans on the same expression in several places, or checking a piece of writing for the kind of phrase-level repetition a plain word-frequency count would never surface.