hard-boiled vs pachydermatous

hard-boiled

adj
  • Callous and unsentimental. 

  • Written in a laconic, dispassionate, often ironic style for a realistic, unsentimental effect. 

  • Cooked to a solid consistency. 

pachydermatous

adj
  • Thick-skinned; insensitive. 

  • Of or relating to the pachyderms. 

  • Like an elephant 

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