case officer vs majordomo

case officer

noun
  • A person assigned to manage a client's affairs. 

  • In intelligence organisations, a person who manages a network of agents. 

majordomo

noun
  • A manager of a hacienda, ranch or estate. 

  • Any overseer, organizer, person in command. 

  • The head servant or official in a royal Spanish or Italian household; later, any head servant in a wealthy household in a foreign country; a leading servant or butler. 

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