kale vs radish

kale

noun
  • An edible plant, similar to cabbage, with curled leaves that do not form a dense head (Brassica oleracea var. acephala) 

  • Any of several cabbage-like food plants that are kinds of Brassica oleracea. 

  • Broth containing kale as a chief ingredient. 

radish

noun
  • The root of this plant used as food. Some varieties are pungent and usually eaten raw in salads, etc., while others have a milder taste and are cooked. 

  • A plant of the Brassicaceae family, Raphanus sativus or Raphanus raphanistrum subsp. sativus, having an edible root. 

  • With a distinguishing word: some other plant of the Raphanus genus or Brassicaceae family. 

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