sickle vs throatless shear

sickle

noun
  • An implement having a semicircular blade and short handle, used for cutting long grass and cereal crops. 

  • Any of the sickle-shaped middle feathers of the domestic cock. 

adj
  • Shaped like the blade of a sickle; crescent-shaped. 

verb
  • Of red blood cells: to assume an abnormal crescent shape. 

  • To deform (as with a red blood cell) into an abnormal crescent shape. 

  • To cut with a sickle. 

throatless shear

noun
  • A cutting tool used to make complex straight and curved cuts in sheet metal. 

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