crimson vs heliotrope

crimson

adj
  • Having a deep red colour. 

  • Immodest. 

noun
  • A deep, slightly bluish red. 

verb
  • To dye with crimson or deep red; to redden. 

  • To become crimson or deep red; to blush. 

heliotrope

adj
  • Light purple or violet. 

  • Keeping one’s face turned toward the sun. 

noun
  • A light purple or violet colour. 

  • Particularly, a purple-flowered plant of the species Heliotropium arborescens. 

  • A bloodstone (a variety of quartz). 

  • An instrument, employed in triangulation, that uses a mirror to reflect sunlight toward another, very distant, surveyor. 

  • The fragrance of heliotrope flowers. 

  • A plant that turns so that it faces the sun. 

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