morbid vs pathogenic

morbid

adj
  • Of, or relating to disease. 

  • Grisly or gruesome. 

  • Suggesting the horror of death; macabre or ghoulish. 

  • Taking an interest in, or fixating on, unhealthy or unwholesome subjects such as death, decay, disease. 

pathogenic

adj
  • Able to cause (harmful) disease. 

  • Consisting of harsh, percussive, nonverbal sounds. 

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