come up with vs flush out

come up with

verb
  • Used other than figuratively or idiomatically: see come, up, with. 

  • To reach or overtake. 

  • To manage to produce, deliver, or present (something) by inventing, creating, thinking of, or obtaining it. 

flush out

verb
  • Used other than figuratively or idiomatically: see flush, out. 

  • To drive out or expose something or someone, as a game bird or other game animal from cover. 

  • To flesh out. 

How often have the words come up with and flush out occurred in a corpus of books? (source: Google Ngram Viewer )