Jennie vs Jenny

Jennie

name

  • A diminutive of the female given names Jane and Jennifer, also used as a formal given name. 

Jenny

name

  • A female given name. 

  • A surname. 

noun

  • A Curtiss JN-4 airplane. 

  • A Wren (a member of the WRNS). 

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