barbarousness vs blackness

barbarousness

noun
  • The state or quality of being barbarous. 

blackness

noun
  • The quality of being evil or dismal. 

  • The state of being of African descent. 

  • The state or quality of being black in colour. 

  • The experiences and culture of African-American people. 

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