Indian turnip vs Jack-in-the-pulpit

Indian turnip

noun

  • Arisaema triphyllum 

  • Used other than figuratively or idiomatically: see Indian, turnip. (also meaning Brassica rapa cultivars in India) 

Jack-in-the-pulpit

noun

  • A plant in the northeastern North America, Arisaema triphyllum. 

  • Any plant in the genus Arisaema. 

  • Cat's cradle. 

  • A woodland plant of northern Europe, Arum maculatum. 

How often have the words Indian turnip and Jack-in-the-pulpit occurred in a corpus of books? (source: Google Ngram Viewer )