hinderlin vs keister

hinderlin

noun

  • The buttocks. 

  • A worthless degenerate. 

keister

noun

  • The anus or buttocks. 

  • A suitcase or satchel. 

verb

  • To conceal something in one's rectum 

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