John-go-to-bed-at-noon vs meadow salsify

John-go-to-bed-at-noon

noun

  • Synonym of Jack-go-to-bed-at-noon 

meadow salsify

noun

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

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