heliotrope vs squill

heliotrope

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

  • 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. 

adj
  • Light purple or violet. 

  • Keeping one’s face turned toward the sun. 

squill

noun
  • A European bulbous liliaceous plant, of the genus Scilla, used in medicine for its acrid, expectorant, diuretic, and emetic properties 

  • A mantis shrimp, Squilla mantis, from the Mediterranean 

  • A sea onion (Drimia maritima) 

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