cast about vs foul up

cast about

verb
  • To plan; plot; contrive. 

  • To try to find; look around; search. 

foul up

verb
  • To botch; to make a mess of. 

  • To make a mistake, to go wrong. 

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