earn vs rake in

earn

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

  • To achieve by being worthy of. 

  • To receive payment for work. 

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

rake in

verb
  • to receive or to collect a large quantity of (something, especially money) 

  • to collect something such as leaves into a pile, often with a rake 

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