culm vs reed

culm

noun
  • the stem of a plant, especially of grass or sedge 

  • anthracite, especially when found in small masses 

  • waste coal, used as a poor quality fuel; slack. 

reed

noun
  • The hollow stem of these plants. 

  • Any of various types of tall stiff perennial grass-like plants growing together in groups near water. 

  • A comb-like part of a beater for beating the weft when weaving. 

  • A piece of whalebone or similar for stiffening the skirt or waist of a woman's dress. 

  • The fourth stomach of a ruminant; rennet. 

  • A musical instrument such as the clarinet or oboe, which produces sound when a musician blows on the reed. 

  • Straw prepared for thatching a roof. 

  • Part of the mouthpiece of certain woodwind instruments, comprising a thin piece of wood or metal which shakes very quickly to produce sound when a musician blows over it. 

  • Reeding. 

  • A tube containing the train of powder for igniting the charge in blasting. 

verb
  • To mill or mint with reeding. 

  • To thatch. 

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