recommendatory vs unfriendly

recommendatory

adj
  • Of or pertaining to a recommendation 

unfriendly

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

adj
  • Not friendly; hostile; mean. 

  • Unfavourable. 

noun
  • An enemy. 

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