muddle-headed vs nebulous

muddle-headed

adj
  • Characterized by vague or confused thinking: foolish, dull-witted, semi-conscious. 

nebulous

adj
  • Vague or ill-defined. 

  • In the form of a cloud or haze; hazy. 

  • Relating to a nebula or nebulae. 

How often have the words muddle-headed and nebulous occurred in a corpus of books? (source: Google Ngram Viewer )