cannabis vs ryegrass

cannabis

noun
  • A tall annual dioecious plant (Cannabis, especially Cannabis sativa), native to central Asia and having alternate, palmately divided leaves and tough bast fibers. 

  • A mildly euphoriant or sedating, intoxicating hallucinogenic drug prepared from various parts of this plant. 

  • The purified and decarboxylated resin of the cannabis plant used for medicinal purposes rather than for any intoxicating effects. 

ryegrass

noun
  • A collection of plants of any of the species, as in a lawn or field. 

  • Any of several species of tufted grasses of the genus Lolium. 

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