Jack-go-to-bed-at-noon vs noonflower

Jack-go-to-bed-at-noon

noun
  • A biannual plant distributed across Europe and North America (Tragopogon pratensis) 

noonflower

noun
  • Flowers of the genus Bauhinia. 

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

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

How often have the words Jack-go-to-bed-at-noon and noonflower occurred in a corpus of books? (source: Google Ngram Viewer )