feather one's nest vs fund

feather one's nest

verb
  • To achieve benefits, especially financial ones, by taking advantage of the opportunities with which one is presented; to amass a comfortable amount of personal wealth. 

fund

verb
  • To place (money) in a fund. 

  • To form a debt into a stock charged with interest. 

  • To pay or provide money for. 

noun
  • A sum or source of money. 

  • An organization managing such money. 

  • A large supply of something to be drawn upon. 

  • A money-management operation, such as a mutual fund. 

How often have the words feather one's nest and fund occurred in a corpus of books? (source: Google Ngram Viewer )