giveaway vs significatory

giveaway

noun
  • The act of giving something away for free. 

  • An indicator that makes something obvious or apparent. 

  • Something that is given away or handed out for free. 

  • An event at which things are given away for free. 

adj
  • free of charge, at no cost. 

  • very low. 

significatory

adj
  • significant; having signification 

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