foggy vs obscure

foggy

adj
  • Confused, befuddled, etc. 

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

  • Obscured by mist or fog; unclear; hazy 

obscure

adj
  • Difficult to understand. 

  • Dark, faint or indistinct. 

  • Not well-known. 

  • Hidden, out of sight or inconspicuous. 

  • Unknown or uncertain; unclear. 

verb
  • To hide, put out of sight etc. 

  • To render obscure; to darken; to make dim; to keep in the dark; to hide; to make less visible, intelligible, legible, glorious, beautiful, or illustrious. 

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