Manny vs Nanny

Manny

name

  • A diminutive of the male given name Emmanuel. 

  • A diminutive of the male given name Manfred. 

  • The city of Manchester, traditionally within the county of Lancashire, England or used more generally referring to the area surrounding, Greater Manchester 

Nanny

name

  • A diminutive of the female given names Ann or Anne. 

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