calumet vs meerschaum

calumet

noun
  • A clay tobacco-pipe used by American Indians, especially as a symbol of truce or peace. 

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 calumet and meerschaum occurred in a corpus of books? (source: Google Ngram Viewer )