penny-ante vs threepenny

penny-ante

adj
  • Trivial. 

  • Played for small stakes. 

  • Of or pertaining to penny ante poker. 

threepenny

adj
  • Of little worth; mean; vulgar. 

  • Having a value or cost of threepence. 

noun
  • A stamp worth three pence. 

How often have the words penny-ante and threepenny occurred in a corpus of books? (source: Google Ngram Viewer )