corps vs horde

corps

noun
  • An organized group of people united by a common purpose. 

  • A battlefield formation composed of two or more divisions. 

horde

noun
  • A large number of people or things. 

  • A wandering troop or gang; especially, a clan or tribe of a nomadic people (originally Tatars) migrating from place to place for the sake of pasturage, plunder, etc.; a predatory multitude. 

verb
  • to travel en masse, to flock 

How often have the words corps and horde occurred in a corpus of books? (source: Google Ngram Viewer )