bedfellow vs caller

bedfellow

noun
  • One with whom one shares a bed. 

  • An associate, often an otherwise improbable one. 

caller

noun
  • The person who makes a telephone call. 

  • A visitor. 

  • The person who stands at the front of the hall and announces the numbers. 

  • A function that calls another (the callee). 

  • The person who directs dancers in certain dances, such as American line dances and square dances. 

  • A whistle or similar item used to call foxes. 

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