bush league vs castaway

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. 

castaway

noun
  • An outcast; someone cast out of a group or society. 

  • A discarded person or thing. 

  • A shipwrecked sailor. 

adj
  • Cast adrift or ashore; marooned. 

  • Shipwrecked. 

  • Cast out; rejected or excluded from a group. 

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