austere vs unfriendly

austere

adj
  • Grim or severe in manner or appearance 

  • Lacking decoration; trivial; not extravagant or gaudy 

unfriendly

adj
  • Not friendly; hostile; mean. 

  • Unfavourable. 

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

noun
  • An enemy. 

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