lowery vs murky

lowery

adj
  • dark and gloomy; threatening; lowering 

murky

adj
  • Dark, dim, gloomy. 

  • Hard to see through, as a fog or mist. 

  • Cloudy, indistinct, obscure. 

  • Dishonest, shady. 

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