churchwarden vs pipework

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. 

pipework

noun
  • The pipes and stops of an organ 

  • Any system of pipes or tubes; piping 

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