insignificant vs minor-league

insignificant

adj
  • Not significant; not important, inconsequential, or having no noticeable effect. 

  • Without meaning; not signifying anything. 

minor-league

adj
  • Of relatively minor importance 

  • Of or pertaining to a minor league 

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