flush out vs wash out

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. 

wash out

verb
  • To wear away by the flow of water; to erode. 

  • To lose traction while going around a turn, especially in cycling, motorsports and skiing/snowboarding. 

  • To remove something by washing. 

  • To wash the inside of something. 

  • To be removed by washing. 

  • To cancel due to bad weather. 

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