brush off vs pass up

brush off

verb
  • Used other than figuratively or idiomatically: see brush, off. To remove something with a brush. 

  • To disregard (something), to dismiss or ignore (someone), as unimportant. 

pass up

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

  • To refuse (not accept); forgo. 

  • To submit (hand in) items to a person, usually one's teacher. 

How often have the words brush off and pass up occurred in a corpus of books? (source: Google Ngram Viewer )