cauldron vs stewpot

cauldron

noun
  • A large bowl-shaped pot used for boiling over an open flame. 

  • A strategic encirclement. 

stewpot

noun
  • A pot used for making stew, usually large and heavy. 

  • A jumble, especially one that lacks intellectual coherence. 

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