Acherontic vs gloomy

Acherontic

adj
  • Lacking joy and comfort; nearing death. 

  • Of, pertaining to or resembling Acheron (one of the rivers located in the underworld according to ancient Greek mythology). 

  • Of or pertaining to hell. 

gloomy

adj
  • Suffering from gloom; melancholy; dejected. 

  • Not very illuminated; dim because of darkness, especially when appearing depressing or frightening. 

noun
  • Someone or something that is gloomy or pessimistic. 

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