commission agent vs commissioner

commission agent

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

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

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

commissioner

noun
  • Someone who commissions something. 

  • Someone commissioned to perform certain duties. 

  • A member of a commission. 

  • An official in charge of a government department, especially a police force. 

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