auctioneer vs dealer

auctioneer

noun
  • A person who conducts an auction on behalf of a vendor, taking bids to find the best price for the vendor. 

verb
  • To sell at an auction; to auction. 

dealer

noun
  • One who deals in goods, especially automobiles; a middleman. 

  • A particular type of stock broker or trader. 

  • A drug dealer, one who peddles illicit drugs. 

  • The person who deals the cards in a card game. 

  • One who deals or metes out anything. 

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