excellent vs hellacious

excellent

adj
  • Exceptionally good of its kind. 

  • Having excelled, having surpassed. 

  • Superior in kind or degree, irrespective of moral quality. 

  • Of higher or the highest quality; splendid. 

hellacious

adj
  • Remarkable, unbelievable, unusual. 

  • nasty, repellent. 

  • horrible, awful, hellish, agonizing 

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