delegacy vs emissary

delegacy

noun
  • The position or state of being a delegate. 

  • A collection of delegates. 

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. 

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