jackass vs lap dog

jackass

noun
  • An inappropriately rude or obnoxious person. 

  • A male donkey. 

  • A foolish or stupid person. 

  • A jack and an ace as a starting hand in Texas hold 'em. 

  • A kind of bootleg liquor. 

verb
  • To behave very obnoxiously. 

lap dog

noun
  • A person who behaves in a servile manner, such as a sycophantic employee or a fawning lover. 

  • A small toy dog, kept as household pet, whose light weight and companionable temperament make it both suited and disposed to spend time resting in the comfort of its master's lap; a dog bred to behave in this manner. 

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