Nancy vs Savanna

Nancy

name
  • A female given name. 

  • A city in the Meurthe-et-Moselle department, Grand Est, north-eastern France. 

Savanna

name
  • A female given name transferred from the place name, of modern usage, variant of Savannah. 

  • A city in Carroll County, Illinois, United States, across the Mississippi from Iowa. 

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