grass vs willow

grass

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

  • 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. 

noun
  • Asparagus; "sparrowgrass". 

  • Marijuana. 

  • 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. 

willow

verb
  • To open and cleanse (cotton, flax, wool, etc.) by means of a willow. 

  • To form a shape or move in a way similar to the long, slender branches of a willow. 

noun
  • Any of various deciduous trees or shrubs in the genus Salix, in the willow family Salicaceae, found primarily on moist soils in cooler zones in the northern hemisphere. 

  • The wood of these trees. 

  • The baseball bat. 

  • A cricket bat. 

  • A rotating spiked drum used to open and clean cotton heads. 

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