fuck all vs what's the difference

fuck all

pron

  • Nothing at all or very little. 

det

  • Nothing at all or very little. 

what's the difference

phrase

  • The difference does not matter; so what? 

  • Used other than figuratively or idiomatically: see what, is, the, difference. 

How often have the words fuck all and what's the difference occurred in a corpus of books? (source: Google Ngram Viewer )