congenial vs unfriendly

congenial

adj
  • Friendly or sociable. 

  • Suitable to one’s needs. 

  • Having the same or very similar nature, personality, tastes, habits or interests. 

unfriendly

adj
  • Not friendly; hostile; mean. 

  • Unfavourable. 

noun
  • An enemy. 

adv
  • in an unkind or unfriendly manner; not as a friend 

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