chilly vs sweltering

chilly

adj
  • Feeling uncomfortably cold. 

  • Distant and cool; unfriendly. 

  • Cold enough to cause discomfort. 

sweltering

noun
  • The situation of being or feeling hot and humid. 

adj
  • hot and humid; oppressively sticky 

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