Acherontic vs bleak

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. 

bleak

adj
  • Unhappy; cheerless; miserable; emotionally desolate. 

  • Without color; pale; pallid. 

  • Desolate and exposed; swept by cold winds. 

noun
  • A small European river fish (Alburnus alburnus), of the family Cyprinidae. 

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