hopeful vs promissory

hopeful

adj
  • inspiring hope 

  • feeling hope 

noun
  • Someone who is hoping for success or victory, especially as a candidate in a political election. 

promissory

adj
  • Containing or consisting of a promise. 

  • Stipulating the future actions required of the parties to an insurance policy or other business agreement. 

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