cold feet vs colic

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. 

colic

noun
  • Severe fussiness and crying, especially of infants with certain medical conditions. 

  • A medicinal plant used to relieve such symptoms. 

  • Severe pains that grip the abdomen or the disease that causes such pains (due to intestinal or bowel-related problems). 

adj
  • Relating to the colon; colonic. 

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