footer vs rugby union

footer

noun
  • Football / soccer. 

  • Something that measures a stated number of feet in some dimension. 

  • Someone who has a preference for using a certain foot. 

  • A line of information printed at the bottom of a page to identify the contents. (Compare foot in printing.) 

verb
  • To meddle with or pass time without accomplishing anything meaningful. 

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 footer and rugby union occurred in a corpus of books? (source: Google Ngram Viewer )