bucket bong vs tobacco pipe

bucket bong

noun
  • A type of bong for smoking marijuana, usually consisting of a bucket or similar device for holding water, a large bottle with its bottom cut off, and a socket for holding the marijuana in the cap. 

tobacco pipe

noun
  • A small, hand-held device consisting in its simplest form of a bowl and stem; used for inhaling the smoke of burning tobacco. 

How often have the words bucket bong and tobacco pipe occurred in a corpus of books? (source: Google Ngram Viewer )