gules vs red-brown

gules

adj
  • In blazon, of the colour red. 

noun
  • Red, e.g. on a coat of arms, typically represented in engraving by vertical parallel lines. 

red-brown

adj
  • Having a colour between red and brown. 

  • Having the qualities of fascism and communism. 

How often have the words gules and red-brown occurred in a corpus of books? (source: Google Ngram Viewer )