callous vs friendly

callous

adj
  • Having calluses, or relating to calluses. 

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

friendly

adj
  • Of or pertaining to friendlies (friendly noun sense 2, below). Also applied to other bipolar confrontations, such as team sports. 

  • Generally warm, approachable and easy to relate with in character. 

  • Inviting, characteristic of friendliness. 

  • Without any hostility. 

  • Compatible with, or not damaging to (the compounded noun). 

  • Promoting the good of any person; favourable; propitious. 

  • Being or relating to two or more natural numbers with a common abundancy. 

  • Having an easy or accepting relationship with something. 

noun
  • A person or entity on the same side in a conflict. 

  • A game which is of no consequence in terms of ranking, betting etc. 

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