feather one's nest vs make money

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. 

make money

verb
  • To make a profit from a particular activity. 

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