headpiece vs millinery

headpiece

noun
  • A headstall. 

  • A decorative page heading used at the start of volumes or chapters. 

  • A headset. 

  • The top piece or part of various things. 

  • Something covering the head. 

  • Protecting cover for the head; a helmet. 

  • The head; the brain. 

millinery

noun
  • Women's hats. 

  • The business and work that a milliner engages in. 

  • A shop selling women's hats. 

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