first-rate vs minor-league

first-rate

adj
  • Of a Royal Navy ship of the line in the Napoleonic Era: having at least 100 guns across three gun decks, a complement of 850–875, and weighing approximately 2,500 tons burthen. 

  • Superb, exceptional; of the best sort; very high quality. 

noun
  • A first-rate ship of the line. 

minor-league

adj
  • Of or pertaining to a minor league 

  • Of relatively minor importance 

How often have the words first-rate and minor-league occurred in a corpus of books? (source: Google Ngram Viewer )