meadow salsify vs noonflower

meadow salsify

noun
  • Synonym of Jack-go-to-bed-at-noon (Tragopogon pratensis) 

noonflower

noun
  • Tragopogon, a type of aster that closes at midday. 

  • Flowers of the family Aizoaceae, especially those of the genus Carpobrotus. 

  • Flowers of the genus Bauhinia. 

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