foggy vs murky

foggy

adj
  • Obscured by mist or fog; unclear; hazy 

  • Being, covered with, or pertaining to fog (“tall grass etc that grows after, or is left after, cutting; moss”) 

  • Confused, befuddled, etc. 

murky

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

  • Dark, dim, gloomy. 

  • Cloudy, indistinct, obscure. 

  • Dishonest, shady. 

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