auctioneer vs buyer

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. 

buyer

noun
  • A person who purchases items for resale in a retail establishment. 

  • A person who purchases items consumed or used as components in the manufacture of products. 

  • A person who makes one or more purchases. 

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