cold feet vs quietness

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. 

quietness

noun
  • Absence of sound; silence or hush. 

  • Absence of disturbance; calm, stillness or serenity. 

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