on offer vs ready

on offer

prep
  • For sale at a reduced price. 

  • Available to take; at hand; being offered or to be offered. 

ready

adj
  • Not slow or hesitating; quick in action or perception of any kind. 

  • Prepared for immediate action or use. 

  • Offering itself at once; at hand; opportune; convenient. 

  • Inclined; apt to happen. 

  • Liable at any moment. 

verb
  • To prepare; to make ready for action. 

noun
  • ready money; cash 

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