cat's whiskers vs real deal

cat's whiskers

noun
  • Something considered to be outstanding. 

  • Java tea (Orthosiphon aristatus) 

real deal

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

  • An authentic bargain. 

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

How often have the words cat's whiskers and real deal occurred in a corpus of books? (source: Google Ngram Viewer )