Festuca elatior vs fescue

Festuca elatior

fescue

verb
  • To use a fescue, or teach with a fescue. 

noun
  • An instrument for playing on the harp; a plectrum. 

  • The style of a sundial. 

  • A hardy grass commonly used to border golf fairways in temperate climates. Any member of the genus Festuca. 

  • A straw, wire, stick, etc., used chiefly to point out letters to children when learning to read. 

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