sealskin vs signet

sealskin

noun
  • An item of clothing made from sealskin (whether real or imitation). 

  • A type of fabric made from the skin of seals. 

  • Any fabric manufactured to resemble sealskin. 

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 sealskin and signet occurred in a corpus of books? (source: Google Ngram Viewer )