emissary vs matchmaker

emissary

noun
  • An agent sent on a mission to represent the interests of someone else. 

  • An underground channel by which the water of a lake escapes. 

  • A venous channel in the skull. 

matchmaker

noun
  • Someone who arranges professional boxing matches. 

  • Someone who makes matchsticks. 

  • Someone who finds suitable dates or marriage partners for other people. 

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