noggin vs waterpot

noggin

noun
  • A small mug, cup or ladle; the contents of such a container. 

  • The head. 

  • A signalling molecule involved in embryo development, producing large heads at high concentrations. 

  • A small measure of spirits equivalent to a gill. 

waterpot

noun
  • A pot or jug for holding water. 

How often have the words noggin and waterpot occurred in a corpus of books? (source: Google Ngram Viewer )