shart vs shiver my timbers

shart

noun
  • An instance of sharting. 

  • The resulting excrement from sharting. 

verb
  • To unintentionally defecate due to relaxing the anus to flatulate. 

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