flush out vs look up

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. 

look up

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

  • To reconnect or meet with someone that one used to know. 

  • To obtain information about something from a reference book. 

  • To have better prospects. 

  • To enter a query into a database or search engine. 

  • To obtain, or seek to obtain, information about something. 

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