insurance vs promise

insurance

noun
  • A means of indemnity against a future occurrence of an uncertain event. 

  • The business of providing insurance. 

  • The car was totalled, but fortunately I had insurance. 

  • Any attempt to forestall an unfavorable event. 

  • A bet made after the deal, which pays off if the dealer has blackjack. 

  • An insurance policy 

promise

noun
  • A placeholder object representing the eventual result of an asynchronous operation. 

  • A transaction between two persons whereby the first person undertakes in the future to render some service or gift to the second person or devotes something valuable now and here to his use. 

  • Reason to expect improvement or success; potential. 

  • an oath or affirmation; a vow 

verb
  • To commit to (some action or outcome), or to assure (a person) of such commitment; to make an oath or vow. 

  • To give grounds for expectation, especially of something good. 

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