bargainer vs middleman

bargainer

noun
  • A person who makes a bargain. 

middleman

noun
  • An intermediary, agent between two (or more) parties. 

  • An intermediate dealer between the manufacturer and the retailer or customer. 

  • One who rents land in large tracts, and lets it in small portions to the peasantry. 

verb
  • To act as a middleman or intermediary. 

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