bush league vs lackluster

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. 

lackluster

adj
  • Not exceptional; not worthy of special merit, attention, or interest; having no vitality. 

  • Having no shine or lustre; dull. 

  • Lacking brilliance or intelligence. 

noun
  • Lack of brightness or points of interest. 

  • A person or thing of no particular brilliance or intelligence. 

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