cold feet vs unease

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. 

unease

noun
  • Trouble; misery; a feeling of disquiet or concern. 

verb
  • To make uneasy or uncomfortable 

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