water spinach vs waterleaf

water spinach

noun
  • Ipomoea aquatica, a green leafy vegetable used as a food in several cuisines of East and Southeast Asia 

  • Basella alba, Malabar spinach, with thick, succulent, heart-shaped leaves 

  • Amaranthus dubius, often bearing red or purple marks 

  • Amaranthus tricolor, edible amaranth 

waterleaf

noun
  • A tropical plant (Talinum fruticosum), the leaves of which are eaten as a vegetable. 

  • Any plant of the genus Hydrophyllum. 

  • A leaf-shaped decoration used on the capitals of columns in late 12th-century Romanesque architecture 

  • An absorbent unsized paper like blotters as opposed to slake-sized or hard sized papers. 

  • Any plant of Hydrophyllaceae, the waterleaf family. 

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