"In machine learning and natural language processing, a topic model is a type of statistical model for discovering the abstract \"topics\" that occur in a collection of documents. Intuitively, given that a document is about a particular topic, one would expect particular words to appear in the document more or less frequently: \"dog\" and \"bone\" will appear more often in documents about dogs, \"cat\" and \"meow\" will appear in documents about cats, and \"the\" and \"is\" will appear equally in both."@en .