assignee vs commission agent

assignee

noun
  • one who is appointed to act or speak in place of another; an agent 

  • one to whom rights or property is being transferred 

  • one to whom a thing is assigned 

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. 

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