bitzer vs dachshund

bitzer

noun
  • A mongrel dog. 

  • A person of mixed race or ethnicity. 

dachshund

noun
  • A certain breed of dog having short legs and a long trunk, including standard-sized, miniature (smooth-haired, long-haired, and short-haired) varieties. 

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