good gravy vs shiver my timbers

good gravy

intj
  • Used to express surprise or anger without a hint of profanity or blasphemy. 

shiver my timbers

intj
  • A mild oath expressing surprise, disbelief or annoyance. It is stereotypically regarded as being uttered by pirates. 

How often have the words good gravy and shiver my timbers occurred in a corpus of books? (source: Google Ngram Viewer )