callous vs torporific

callous

adj
  • Emotionally hardened; unfeeling and indifferent to the suffering/feelings of others. 

  • Having calluses, or relating to calluses. 

torporific

adj
  • Inducing torpor; tending to cause apathy or lethargy. 

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