gelato vs water ice

gelato

noun
  • An Italian variant of ice cream made from milk and sugar, combined with other flavourings. The ingredients are supercooled while stirring to break up ice crystals as they form. 

water ice

noun
  • A dessert made from crushed ice that has been sweetened and flavoured. 

  • Ice made of frozen water; water in a solid physical state, especially when distinguished from other frozen substances. Contrast liquid water, water vapor. 

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