manroot vs wild cucumber

manroot

noun
  • A flowering plant in the gourd family (Cucurbitaceae), genus Marah, native to western North America. 

  • Ipomoea leptophylla 

  • Ipomoea pandurata 

wild cucumber

noun
  • Marah, a genus of gourds native to western North America 

  • Armenian cucumber, in the flexuosus cultivar group of Cucumis melo subsp. melo. 

  • Echinocystis lobata, a species of gourd found throughout most of North America 

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