alderman vs churchwarden

alderman

noun
  • A long pipe for smoking. 

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

  • A potbelly, paunch. 

churchwarden

noun
  • A churchwarden pipe. 

  • A lay officer of the Church of England who handles the secular affairs of the parish. 

  • A similar functionary of the Episcopal church. 

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