WAG vs superstar

WAG

noun
  • A wife or girlfriend of a sports star or other celebrity, originally and especially of an association football player. 

  • A wild-assed guess; a rough estimate. 

superstar

noun
  • Someone who has accumulated a vast amount of fame; a high-level celebrity. 

  • A giant star. 

  • An exceptionally productive employee. 

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