feather one's nest vs line one's pockets

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. 

line one's pockets

verb
  • To accumulate personal wealth, especially in an illegal or morally objectionable manner. 

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