muskroot vs nard

muskroot

noun
  • Nardostachys jatamansi (nard) 

  • A tall umbelliferous plant (Ferula moschata, syn. Ferula sumbul) 

  • Plants of genus Adoxa (moschatel), especially species Adoxa moschatellina, found in most of the temperate Northern Hemisphere. 

  • The root of F. moschata, formerly used in medicine and as a substitute for musk. 

nard

noun
  • Nardostachys jatamansi, a flowering plant of the valerian family that grows in the Himalayas, used as a perfume, an incense, a sedative, and an herbal medicine. 

  • A testicle. 

  • A fragrant oil from the plant, formerly much prized. 

  • American spikenard (Aralia racemosa), a North American perennial herb with an aromatic root. 

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