greenfish vs valerian

greenfish

noun
  • especially, Pomatomus saltatrix 

  • Certain of the fish called bluefish 

  • Girella spp., esp. Girella nigricans. 

  • Thalassoma ascensionis et al. 

  • Pollock (Pollachius spp., esp. Pollachius pollachius). 

valerian

noun
  • A hardy perennial flowering plant, Valeriana officinalis, with heads of sweetly scented pink or white flowers. 

  • An extract of the dried roots of the Valeriana officinalis used in herbal medicine as a sedative. 

  • More generally, any plant of the genus Valeriana. 

  • The root of Valeriana officinalis, used in herbal medicine. 

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