batty vs sit upon

batty

noun

  • The buttocks or anus. 

  • A homosexual man. 

adj

  • Mad, crazy, silly. 

sit upon

noun

  • buttocks, bottom 

  • small, portable cushion for sitting on 

verb

  • Synonym of sit on (“block, suppress, hold back”) 

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