auction vs sell-off

auction

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

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

verb
  • To sell at an auction. 

sell-off

noun
  • The large-scale selling of goods or financial stocks. 

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