distributor vs middleperson

distributor

noun
  • One who or that which distributes. 

  • A device that distributes electric current, especially to the spark plugs in an internal combustion engine. 

  • A machine for distributing type. 

  • An appliance, such as a roller, in a printing press, for distributing ink. 

middleperson

noun
  • An intermediate dealer of any gender; a middleman or middlewoman. 

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