orchid vs purpure

orchid

adj
  • having a light purple colour. 

noun
  • A light bluish-red, violet-red or purple colour. 

  • A plant of the orchid family (Orchidaceae), bearing unusually-shaped flowers of beautiful colours. 

purpure

adj
  • In blazon, of the colour purple. 

noun
  • A purple colour on a coat of arms, represented in engraving by diagonal parallel lines 45 degrees clockwise. 

  • purpure 

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