bush league vs feeble

bush league

adj
  • Of inferior quality. 

  • Amateurish, unprofessional, unpolished, juvenile. 

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

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

feeble

adj
  • Lacking force, vigor, or effectiveness in action or expression; faint. 

  • Deficient in physical strength. 

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