barbarous vs pathogenic

barbarous

adj
  • Like a barbarian, especially in sound; noisy, dissonant. 

  • Mercilessly or impudently violent or cruel, savage. 

  • Not classical or pure. 

  • Uncivilized, uncultured. 

pathogenic

adj
  • Consisting of harsh, percussive, nonverbal sounds. 

  • Able to cause (harmful) disease. 

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