adusk vs murk

adusk

adj
  • Resembling conditions at dusk or twilight, low-lit, dark; in darkness, gloomy. 

adv
  • At dusk; in the dusk or twilight. 

murk

adj
  • Dark, murky 

verb
  • To murder or seriously injure. 

  • To make murky or be murky; to cloud or obscure, or to be clouded or obscured. 

noun
  • Darkness, or a dark or gloomy environment. 

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