flush out vs rinse off

flush out

verb
  • To flesh out. 

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

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

rinse off

verb
  • To clean by rinsing. 

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