cast about vs flummox

cast about

verb
  • To plan; plot; contrive. 

  • To try to find; look around; search. 

flummox

verb
  • To confuse; to fluster; to flabbergast. 

  • To give in, to give up, to collapse. 

How often have the words cast about and flummox occurred in a corpus of books? (source: Google Ngram Viewer )