blazonry vs signet

blazonry

noun
  • An artistic representation or display. 

  • Blazon. 

  • A coat of arms; an armorial bearing or bearings. 

signet

noun
  • an object (especially a ring) formerly used to impress a picture into the sealing wax of a document as a proof of its origin 

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