flora vs verdure

flora

noun
  • Plants considered as a group, especially those of a particular country, region, time, etc. 

  • The microorganisms that inhabit some part of the body. 

  • A book describing the plants of a country, region, time, etc. 

verdure

noun
  • The greenness of lush or growing vegetation; also: the vegetation itself. 

  • A condition of health and vigour. 

verb
  • To cover with verdure. 

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