grass vs weed

grass

noun
  • Marijuana. 

  • Asparagus; "sparrowgrass". 

  • Sharp, closely spaced discontinuities in the trace of a cathode-ray tube, produced by random interference. 

  • The season of fresh grass; spring or summer. 

  • An informer, police informer; one who betrays a group (of criminals, etc) to the authorities. 

  • The surface of a mine. 

  • A lawn. 

  • Various plants not in family Poaceae that resemble grasses. 

  • Noise on an A-scope or similar type of radar display. 

  • Any plant of the family Poaceae, characterized by leaves that arise from nodes in the stem and leaf bases that wrap around the stem, especially those grown as ground cover rather than for grain. 

verb
  • To bring to the grass or ground; to land. 

  • To feed with grass. 

  • To act as a grass or informer, to betray; to report on (criminals etc) to the authorities. 

  • To lay out on the grass; to knock down (an opponent etc.). 

  • To cover with grass or with turf. 

  • To expose, as flax, on the grass for bleaching, etc. 

weed

noun
  • Cannabis. 

  • Any plant unwanted at the place where and at the time when it is growing. 

  • Tobacco. 

  • Underbrush; low shrubs. 

  • A sudden illness or relapse, often attended with fever, which befalls those who are about to give birth, are giving birth, or have recently given birth or miscarried or aborted. 

  • Something unprofitable or troublesome; anything useless. 

  • A puny person; one who has little physical strength. 

  • Lymphangitis in a horse. 

  • A weak horse, which is therefore unfit to breed from. 

verb
  • To systematically remove materials from a library collection based on a set of criteria. 

  • To remove unwanted vegetation from a cultivated area. 

  • To pilfer the best items from a collection. 

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