churchwarden vs meerschaum

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. 

meerschaum

noun
  • A smoking-pipe made from meerschaum. 

  • A soft white mineral, chiefly used for smoking-pipes and cigar holders. 

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