cloakroom attendant vs john

cloakroom attendant

noun
  • A person who works in a cloakroom (a room intended for holding guests' cloaks and other heavy outerwear, as at a theater or night club). 

john

noun
  • A prostitute's client. 

  • A device or place to urinate and defecate: now usually a toilet or lavatory, but also (dated) a chamber pot or outhouse. 

  • A male mule. 

  • A Western man traveling in East Asia. 

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