anus vs shitbum

anus

noun
  • An impolite, unpopular, or unintelligent person. 

  • The lower orifice of the alimentary canal, through which feces and flatus are ejected. 

shitbum

noun
  • An unclean, or otherwise undesirable person. 

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