barbarism vs fiendishness

barbarism

noun
  • The condition of existing barbarically. 

  • A barbaric act. 

  • An error in language use within a single word, such as a mispronunciation. 

  • A word hybridizing Ancient Greek and Latin or other heterogeneous roots. 

fiendishness

noun
  • The quality of being fiendish. 

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