intercessor vs interlocutor

intercessor

noun
  • A person who intercedes; a mediator; one who reconciles enemies, or pleads for another. 

  • A middleman, intermediary 

  • A bishop who acts during a vacancy in a see. 

interlocutor

noun
  • A person who takes part in dialogue or conversation. 

  • A man in the middle of the line in a minstrel show who questions the end men and acts as leader. 

  • A decree of a court. 

  • An interlocutory judgement or sentence. 

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