douche boat vs shit ass

douche boat

noun
  • A rude, obnoxious, or contemptible person. 

  • A river craft outfitted with a high-pressure water cannon capable of destroying enemy encampments. 

shit ass

noun
  • A jerk; an inappropriately or objectionably mean, inconsiderate, contemptible, obnoxious, intrusive, or rude person. 

How often have the words douche boat and shit ass occurred in a corpus of books? (source: Google Ngram Viewer )