gourd vs nard

gourd

noun
  • A hard-shelled fruit from a plant in Lagenaria or Cucurbita. 

  • Any of the trailing or climbing vines producing fruit with a hard rind or shell, from the genera Lagenaria and Cucurbita (in Cucurbitaceae). 

  • The dried and hardened shell of such fruit, made into a drinking vessel, bowl, spoon, or other objects designed for use or decoration. 

  • loaded dice. 

  • Head. 

nard

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

  • 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. 

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

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