pachydermatous vs thin-skinned

pachydermatous

adj
  • Of or relating to the pachyderms. 

  • Like an elephant 

  • Thick-skinned; insensitive. 

thin-skinned

adj
  • Used other than figuratively or idiomatically: see thin, skinned. 

  • Overly sensitive to criticism; quick to take offence; irritable; touchy 

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