fall behind vs thrive

fall behind

verb
  • Used other than figuratively or idiomatically: see fall, behind. 

  • To be late (for a regular event) 

  • To be progressively below average in performance. 

  • to fail to keep up (with) 

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 behind and thrive occurred in a corpus of books? (source: Google Ngram Viewer )