alderman vs churchwarden pipe

alderman

noun
  • A long pipe for smoking. 

  • A member of a municipal legislative body in a city or town. 

  • A potbelly, paunch. 

churchwarden pipe

noun
  • A tobacco pipe with a long, curved stem. 

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