mountain mint vs nepitella

mountain mint

noun
  • A European herb, Clinopodium nepeta, sometimes used as a seasoning. 

  • Any of several plants in the genus Monardella, native to western North America 

  • Any plant of the genus Pycnanthemum in the mint family. 

nepitella

noun
  • A herb, Clinopodium nepeta, lesser calamint. 

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