heliotrope vs rubric

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. 

rubric

adj
  • Coloured or marked with red; placed in rubrics. 

  • Of or relating to the rubric or rubrics; rubrical. 

noun
  • A flourish after a signature. 

  • Red ochre. 

  • A set of scoring criteria for evaluating student work and for giving feedback. 

  • The directions for a religious service, formerly printed in red letters. 

  • A heading in a book highlighted in red. 

  • A title of a category or a class. 

  • An established rule or custom; a guideline. 

verb
  • To adorn with red; to redden. 

  • To organise or classify into rubrics 

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