crass vs pachydermatous

crass

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

  • materialistic 

  • dense 

  • Lacking finesse; crude and obvious. 

pachydermatous

adj
  • Thick-skinned; insensitive. 

  • Of or relating to the pachyderms. 

  • Like an elephant 

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