chilling vs cooling

chilling

noun
  • The act by which something is chilled. 

adj
  • Causing mild fear. 

  • Becoming cold. 

  • Causing cold. 

cooling

noun
  • A decrease in temperature. 

  • Refrigeration. 

adj
  • That cools. 

  • . Of food or medicine, according to traditional Chinese medicine: serving to cool or calm the body. 

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