pachydermal vs pachydermatous

pachydermal

adj
  • Characterized by or characteristic of pachydermy. 

  • Pertaining to the obsolete taxonomic order Pachydermata. 

  • Pertaining to or involving elephants. 

  • Massive; elephantine. 

  • Grainy. 

pachydermatous

adj
  • Of or relating to the pachyderms. 

  • Like an elephant 

  • Thick-skinned; insensitive. 

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