airing vs cooling

airing

noun
  • An exposure to warm or fresh air. 

  • A public expression of an opinion or discussion of a subject. 

  • The broadcast of a television or radio show. 

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 airing and cooling occurred in a corpus of books? (source: Google Ngram Viewer )