commission agent vs emissary

commission agent

noun
  • An agent entrusted with the possession of goods to be sold in the agent's name. 

  • A merchant earning a commission by selling goods belonging to others. 

  • A person entrusted with a confidential task, often secretly to place a bet. 

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 commission agent and emissary occurred in a corpus of books? (source: Google Ngram Viewer )