contact person vs interlocutor

contact person

noun
  • A person with whom one has had contact; a contact. 

  • A person in an organization or group that non-members can contact in order to interact with the group; a representative whose contact details are made public. 

  • A person, such as next of kin, who should be told about someone's situation if an emergency occurs. 

  • A point person. 

  • A person in an organization whose role puts them in contact with non-members. 

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 contact person and interlocutor occurred in a corpus of books? (source: Google Ngram Viewer )