prosper vs strike gold

prosper

verb
  • To be successful; to succeed; to be fortunate or prosperous; to thrive; to make gain. 

  • To grow; to increase. 

  • To favor; to render successful. 

strike gold

verb
  • To be lucky, to win or be successful. 

  • To find gold 

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