gauzy vs thick as thieves

gauzy

adj
  • tinged with tenderness and warmth; dewy-eyed, romantic 

  • light; giving the effect of haze 

  • vague or elusive 

  • Resembling gauze; light, thin, translucent. 

thick as thieves

adj
  • Intimate, close-knit, tight. 

How often have the words gauzy and thick as thieves occurred in a corpus of books? (source: Google Ngram Viewer )