cold feet vs consternation

cold feet

noun
  • A feeling of nervousness or anxiousness causing one to reconsider a decision about an upcoming event. 

  • Used other than figuratively or idiomatically: see cold, feet. 

consternation

noun
  • Amazement or horror that confounds the faculties, and incapacitates for reflection; terror, combined with amazement; dismay. 

How often have the words cold feet and consternation occurred in a corpus of books? (source: Google Ngram Viewer )