field hospital vs lazaretto

field hospital

noun
  • A large mobile medical unit that temporarily takes care of casualties before they can be safely transported to more permanent hospital facilities. 

lazaretto

noun
  • A building such as a hospital, or occasionally a ship, used to temporarily isolate sick people to prevent the spread of infectious diseases; a quarantine. 

  • A place reserved for people with infectious diseases (especially leprosy or plague) to live on a long-term basis. 

  • A place at the front of the tweendecks of a merchant ship where provisions are stored. 

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