barbarity vs viciousness

barbarity

noun
  • The state of being barbarous; brutality 

  • A crude act 

  • crudity 

  • A barbaric act 

viciousness

noun
  • the characteristic of being vicious 

  • the desire to cause harm to others; extreme cruelty 

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