keister vs notecase

keister

noun

  • A suitcase or satchel. 

  • The anus or buttocks. 

verb

  • To conceal something in one's rectum 

notecase

noun

  • A wallet or billfold (for holding banknotes). 

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