bangstry vs barbarism

bangstry

noun
  • violence 

barbarism

noun
  • A barbaric act. 

  • The condition of existing barbarically. 

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

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

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