auspicious vs promissory

auspicious

adj
  • Of good omen; indicating future success. 

  • Conducive to success. 

  • Marked by success; prosperous. 

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 auspicious and promissory occurred in a corpus of books? (source: Google Ngram Viewer )