strike gold vs take back

strike gold

verb
  • To find gold 

  • To be lucky, to win or be successful. 

take back

verb
  • To retract/withdraw an earlier statement 

  • To cause to remember some past event or time 

  • To regain possession of something 

  • To return something to a vendor for a refund 

  • To resume a relationship 

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