corps vs garrison

corps

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

  • A battlefield formation composed of two or more divisions. 

garrison

noun
  • Occupants. 

  • The troops stationed at such a post. 

  • A permanent military post. 

  • A military unit, nominally headed by a colonel, equivalent to a USAF support wing, or an army regiment. 

verb
  • To convert into a military fort. 

  • To occupy with troops. 

  • To assign troops to a military post. 

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