penalize vs refund

penalize

verb
  • To impose a handicap on. 

  • To subject to a penalty, especially for the infringement of a rule or regulation. 

refund

verb
  • To return (money) to (someone); to reimburse. 

noun
  • An amount of money returned. 

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