undisturbed vs unfriendly

undisturbed

adj
  • not disturbed or agitated 

  • calm 

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 undisturbed and unfriendly occurred in a corpus of books? (source: Google Ngram Viewer )