Popsicle vs ice cream bar

Popsicle

noun
  • A type of ice lolly. 

ice cream bar

noun
  • A frozen dessert on a stick or a candy bar that has ice cream in it. The coating is usually a thin layer of chocolate. 

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