Oswego tea vs bee balm

Oswego tea

noun
  • An American aromatic herb (Monarda didyma) with bright red labiate flowers. 

bee balm

noun
  • Other species in the genus Monarda. 

  • The aromatic plant Monarda didyma or bergamot, native to North America. 

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