line one's pockets vs look out for number one

line one's pockets

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

look out for number one

verb
  • To act in one's own interests; to act in a manner advantageous primarily to oneself. 

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