Indian corn vs maize

Indian corn

noun
  • a variety of maize in which the kernels are variously coloured, rather than being all of the same colour 

  • a variety of candy corn that contains chocolate in addition to honey-based candy 

maize

noun
  • Corn; a type of grain of the species Zea mays. 

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