jackass vs laughing kookaburra

jackass

verb
  • To behave very obnoxiously. 

noun
  • A male donkey. 

  • A foolish or stupid person. 

  • An inappropriately rude or obnoxious person. 

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

  • A kind of bootleg liquor. 

laughing kookaburra

noun
  • A species of kookaburra, Dacelo novaeguineae, native to eastern Australia and famed for its loud laugh-like call. 

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