cold feet vs dejection

cold feet

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

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

dejection

noun
  • The act of humbling or abasing oneself. 

  • A state of melancholy or depression; low spirits, the blues. 

  • A low condition; weakness; inability. 

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