hazy vs unheard

hazy

adj
  • Obscure; confused; not clear. 

  • Thick or obscured with haze. 

  • Not clear or transparent. 

unheard

adj
  • Not known to fame; not illustrious or celebrated; obscure. 

  • Not heard. 

  • Not listened to. 

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