I'll be a son of a gun vs leapin' lizards

I'll be a son of a gun

intj

  • Expressing surprise or disbelief. 

leapin' lizards

intj

  • Used to express shock or dismay. 

How often have the words I'll be a son of a gun and leapin' lizards occurred in a corpus of books? (source: Google Ngram Viewer )