bet a dollar to a dime vs bet a dollar to a doughnut

bet a dollar to a dime

verb
  • Synonym of bet a dollar to a doughnut 

bet a dollar to a doughnut

verb
  • To declare with confidence. 

How often have the words bet a dollar to a dime and bet a dollar to a doughnut occurred in a corpus of books? (source: Google Ngram Viewer )