Reuben vs submarine sandwich

Reuben

noun
  • A grilled or toasted sandwich made with corned beef, sauerkraut, Swiss cheese, and either Russian dressing or Thousand Island dressing. 

  • A member of one of the Israelite tribes, descended from Reuben. 

name
  • First son of Jacob, by his wife Leah. 

  • A male given name from Hebrew. 

  • A surname transferred from the given name 

submarine sandwich

noun
  • A sandwich made on a long roll split lengthwise. 

How often have the words Reuben and submarine sandwich occurred in a corpus of books? (source: Google Ngram Viewer )