Jerusalem crickets vs shiver my timbers

Jerusalem crickets

intj
  • gosh; wow; expressing astonishment. 

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 Jerusalem crickets and shiver my timbers occurred in a corpus of books? (source: Google Ngram Viewer )