basketball vs rugby union

basketball

noun
  • A sport in which two opposing teams of five players strive to put a ball through a hoop. 

  • The particular kind of ball used in the sport of basketball. 

verb
  • To throw in a similar way to when shooting a basketball 

  • To play basketball 

rugby union

noun
  • A form of rugby football, historically amateur, having 15 players per side; points are scored for a try, penalty, drop kick or conversion. 

How often have the words basketball and rugby union occurred in a corpus of books? (source: Google Ngram Viewer )