foggy vs hazy

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. 

hazy

adj
  • Thick or obscured with haze. 

  • Not clear or transparent. 

  • Obscure; confused; not clear. 

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