Battle of Jena vs Jena

Battle of Jena

Jena

name
  • A female given name of rare usage, variant of Gina. 

  • An independent city in Thuringia, Germany. 

  • A town, the parish seat of LaSalle Parish, Louisiana, United States, which was named after the German city. 

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