milk saucepan vs teapot

milk saucepan

noun
  • A small saucepan, often coated with Teflon etc, having a wide lip; typically used to heat milk for drinks 

teapot

noun
  • A vessel for brewing and serving tea. 

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