antediluvial vs unfriendly

antediluvial

adj
  • Antiquated. 

  • Of or pertaining to a time before Noah's flood. 

unfriendly

adj
  • Unfavourable. 

  • Not friendly; hostile; mean. 

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

noun
  • An enemy. 

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