Bobby vs Ish

Bobby

name

  • A diminutive of the female given name Roberta. 

  • A diminutive of the male given name Robert. 

Ish

name

  • A diminutive of the female given name Ishani. 

  • A diminutive of the male given name Ishmael. 

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