offering vs rip-off

offering

noun
  • Something put forth, bid, proffered or tendered, such as for sale 

  • That which has been offered; a sacrifice. 

  • The act by which something is offered. 

  • A contribution given at a religious service. 

  • An oblation or presentation made as a religious act. 

rip-off

noun
  • A scam. 

  • A theft or robbery. 

  • A copy, especially one that is illegal or inferior. 

  • A bad deal; an unfair or exorbitant price or rate. 

How often have the words offering and rip-off occurred in a corpus of books? (source: Google Ngram Viewer )