cold feet vs uneasiness

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. 

uneasiness

noun
  • An anxious state of mind; anxiety. 

  • The state of being uneasy, nervous or restless. 

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