mithridate mustard vs stinkweed

mithridate mustard

stinkweed

noun

  • Jimsonweed (Datura stramonium). 

  • Tree of heaven (Ailanthus altissima). 

  • Any other noxious plant. 

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