auctioneer vs vendor

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. 

vendor

noun
  • A person or a company that vends or sells. 

  • A vending machine. 

verb
  • As the software vendor, to bundle one's own, possibly modified version of dependencies with a standard program. 

  • To bundle third-party dependencies with the source code for one's own program. 

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