defray vs earn

defray

verb
  • To pay or discharge (a debt, expense etc.); to meet (the cost of something). 

earn

verb
  • To receive payment for work. 

  • To cause (someone) to receive payment or reward. 

  • To achieve by being worthy of. 

  • To gain (success, reward, recognition) through applied effort or work. 

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