chilly vs penetrating

chilly

adj
  • Feeling uncomfortably cold. 

  • Distant and cool; unfriendly. 

  • Cold enough to cause discomfort. 

penetrating

adj
  • able to pierce or penetrate 

  • demonstrating acute or keen understanding 

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