greatest thing since sliced bread vs real deal

greatest thing since sliced bread

noun
  • Something amazing, outstanding or praiseworthy, especially a relatively recent invention likely to improve people's lives. 

real deal

noun
  • A thing or person that is genuine, authentic, or worthy of serious regard. 

  • An authentic bargain. 

  • A beneficial result or favorable state-of-affairs. 

How often have the words greatest thing since sliced bread and real deal occurred in a corpus of books? (source: Google Ngram Viewer )