chilly vs frosty

chilly

adj
  • Feeling uncomfortably cold. 

  • Distant and cool; unfriendly. 

  • Cold enough to cause discomfort. 

frosty

adj
  • Cold, chilly. 

  • Having an aloof or inhospitable manner. 

  • Having frost on it. 

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