ferociously vs vehemently

ferociously

adv
  • In a ferocious manner, particularly violent and aggressive. 

  • Intensely or extremely. 

vehemently

adv
  • In a vehement manner; expressing with a strong or forceful attitude. 

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