compulsion vs fad

compulsion

noun
  • An irrational need or irresistible urge to perform some action, often despite negative consequences. 

  • The use of authority, influence, or other power to force (compel) a person or persons to act. 

  • The lawful use of violence (i.e. by the administration). 

fad

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

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