auction vs offer

auction

verb
  • To sell at an auction. 

noun
  • The first stage of a deal, in which players bid to determine the final contract. 

  • A public event where goods or property are sold to the highest bidder. 

offer

verb
  • To bid, as a price, reward, or wages. 

  • To present in words; to proffer; to make a proposal of; to suggest. 

  • To put in opposition to; to manifest in an offensive way; to threaten. 

  • To happen, to present itself. 

  • To place at someone’s disposal; to present (something) to be either accepted or turned down. 

  • To place (something) in a position where it can be added to an existing mechanical assembly. 

  • To propose or express one's willingness (to do something). 

  • To present (something) to God or gods as a gesture of worship, or for a sacrifice. 

noun
  • An invitation to enter into a binding contract communicated to another party which contains terms sufficiently definite to create an enforceable contract if the other party accepts the invitation. 

  • Something put forth, bid, proffered or tendered. 

  • A proposal that has been made. 

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