fall on hard times vs thrive

fall on hard times

verb
  • To experience a difficult period, especially financially. 

thrive

verb
  • To increase in wealth or success; to prosper, be profitable. 

  • To grow or increase stature; to grow vigorously or luxuriantly, to flourish. 

How often have the words fall on hard times and thrive occurred in a corpus of books? (source: Google Ngram Viewer )