Reuben vs Rubin

Reuben

name
  • A male given name from Hebrew. 

  • First son of Jacob, by his wife Leah. 

  • A surname transferred from the given name 

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. 

Rubin

name
  • A male given name from Hebrew, of rather rare usage, variant of Reuben. 

  • A surname transferred from the given name. 

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