hubbub vs tumult

hubbub

noun
  • A confused uproar, commotion, tumult or racket. 

verb
  • To cause a tumult or racket. 

tumult

noun
  • Violent commotion or agitation, often with confusion of sounds. 

  • Confused, agitated noise as made by a crowd. 

  • A riot or uprising. 

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