clouded vs foggy

clouded

adj
  • Filled with clouds. 

  • Variegated with spots. 

  • Made dim or blurry. 

  • Unclear; surrounded in mystery. 

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. 

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