Christ on a raft vs shiver my timbers

Christ on a raft

intj
  • Synonym of Christ on a bike 

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