ghoulish vs gruesome

ghoulish

adj
  • Fascinated by corpses. 

  • Of or pertaining to corpses and graverobbing. 

  • Of or pertaining to ghouls. 

gruesome

adj
  • Repellently frightful and shocking; horrific or ghastly. 

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