crass vs unbefriending

crass

adj
  • coarse; crude; unrefined or insensitive; lacking discrimination 

  • materialistic 

  • dense 

  • Lacking finesse; crude and obvious. 

unbefriending

adj
  • unfriendly; hostile 

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