rain check vs suggestion

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. 

suggestion

noun
  • Something suggested (with subsequent adposition being for) 

  • Information, insinuation, speculation, as opposed to a sworn testimony and evidence. 

  • Something implied, which the mind is liable to take as fact. 

  • The act of suggesting. 

  • The act of exercising control over a hypnotised subject by communicating some belief or impulse by means of words or gestures; the idea so suggested. 

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