bush league vs jackass

bush league

noun
  • A low-ranking or inferior level among groups, professions, organizations, etc. 

  • A professional sports association at the lower levels of minor league organization. 

adj
  • Of inferior quality. 

  • Amateurish, unprofessional, unpolished, juvenile. 

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. 

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