Fritz vs Rip

Fritz

name

  • A male given name from German. 

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

noun

  • A German person, usually male. 

Rip

name

  • A male given name from Dutch 

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