chaplet vs headpiece

chaplet

noun
  • A garland or circlet for the head. 

  • A set of repetitive prayers, other than the Rosary, typically prayed with a string of beads. 

  • The Chaplet of Divine Mercy, the most well-known chaplet in the Catholic Church. 

  • A metal support for a cylindrical pipe. 

  • A molding in the form of a string of beads; a bead molding. 

  • A small chapel or shrine. 

  • A bent piece of sheet iron, or a pin with thin plates on its ends, for holding a core in place in the mould. 

  • A headdress in the form of a wreath made of leaves, flowers or twigs woven into a ring. 

headpiece

noun
  • Something covering the head. 

  • A headstall. 

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

  • A headset. 

  • The top piece or part of various things. 

  • Protecting cover for the head; a helmet. 

  • The head; the brain. 

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