promissory vs reassuring

promissory

adj
  • Containing or consisting of a promise. 

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

reassuring

adj
  • That reassures; causing comfort or confidence. 

noun
  • reassurance 

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