horsemint vs spotted bee balm

horsemint

noun
  • A coarse American plant of the mint family (Monarda punctata). 

  • An aromatic plant of the mint family, Agastache urticifolia. 

  • Wild mint (Mentha sylvestris, now Mentha longifolia). 

spotted bee balm

noun
  • Monarda fruticulosa 

  • Monarda punctata, found in Quebec, Ontario, eastern and south-central United States, California, and northeastern Mexico. 

How often have the words horsemint and spotted bee balm occurred in a corpus of books? (source: Google Ngram Viewer )