Fritz vs Wend

Fritz

noun
  • A German person, usually male. 

name
  • A male given name from German. 

  • A name used to represent the German people (particularly the German armed forces) as a group. 

Wend

noun
  • A Slavic person living anywhere in the vicinity of German-speaking areas. 

  • A member of a Slavic people from the borders of Germany and Poland; a Sorb; a Kashub. 

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