coolness vs fad

coolness

noun
  • The result or product of being cool, i.e. chilly. 

  • Indifference; lack of passion or interest. 

  • The state of being cool, i.e. calm. 

  • The state of being cool, i.e. good or pleasing. 

  • The result or product of being cool, i.e. good or pleasing. 

  • The state of being cool, i.e. chilly. 

fad

noun
  • A phenomenon that becomes popular for a very short time. 

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