cast down vs nonplus

cast down

verb
  • To make (a person) discouraged or dejected. 

  • To overthrow, to defeat or bring to ruin. 

  • Used other than figuratively or idiomatically: see cast, down. 

nonplus

verb
  • To bewilder or perplex (someone); to confound, to flummox. 

noun
  • A state of bewilderment or perplexity. 

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