mad-dog vs rabid

mad-dog

adj
  • Fanatically or irrationally ferocious. 

rabid

adj
  • Very extreme, unreasonable, or fanatical in opinion; excessively zealous. 

  • Furious; raging; extremely violent. 

  • Of or pertaining to rabies, or hydrophobia. 

  • Affected with rabies. 

noun
  • A human or animal infected with rabies. 

  • Someone who is fanatical in opinion. 

How often have the words mad-dog and rabid occurred in a corpus of books? (source: Google Ngram Viewer )