crass vs foul-mouthed

crass

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

  • materialistic 

  • dense 

  • Lacking finesse; crude and obvious. 

foul-mouthed

adj
  • Tending to use obscene or offensive language. 

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