inducement vs rain check

inducement

noun
  • An incentive that helps bring about a desired state. In some contexts, this can imply bribery. 

  • An introductory statement of facts or background information. 

  • The act of placing a port on a vessel's itinerary because the volume of cargo offered at that port justifies the cost of routing the vessel. 

rain check

noun
  • In social interactions, a deferred invitation, or deferred acceptance of an invitation. 

  • to make good on any experience that the customer deems unsatisfactory. 

  • A reissue, at no extra charge, of a ticket for a baseball game or other outdoor event postponed or interrupted because of rain. 

  • to provide a sold-out item or temporarily unavailable service at a later date for the running (usually special) price. 

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