hand glass vs trumeau

hand glass

noun
  • A small mirror with a handle. 

  • A small glazed frame for the protection of plants. 

trumeau

noun
  • A trumeau mirror. 

  • The pillar or center post supporting the lintel in the middle of a doorway or window opening, especially in a church. 

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