cooler vs military prison

cooler

noun
  • A prison. 

  • A bouncer or doorman. 

  • A cold deck. 

  • An insulated bin or box used with ice or freezer packs to keep food or beverages cold while picnicking or camping. 

  • Anything which cools. 

  • A device for refrigerating dead bodies in a morgue. 

  • A type of drink made with alcohol, especially wine, mixed with fruit juice. 

  • samalamig 

military prison

noun
  • A prison operated by the military. 

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