bloodwort vs cat's-paw

bloodwort

noun
  • Sanguinary, common yarrow, Achillea millefolium. 

  • Rumex sanguineus, bloody dock, wood dock, bloody-veined dock. 

  • Capsella bursa-pastoris, shepherd's purse. 

  • Any of the Haemodoraceae, a family of flowering plants some of whose roots contain a red dye. 

  • The plant bloodroot, Sanguinaria canadensis. 

  • Various species in the genus Sanguisorba, burnet. 

cat's-paw

noun
  • Any of several species of North American freshwater mussels of the genus Epioblasma, especially E. obliquata. 

  • A paw of a cat. 

  • A metal set of claws worn over the hand or wielded in the hand used to remove skin and flesh. 

  • A small crowbar with a handle at a right angle to a blade with a V-shaped notch, principally used by carpenters to remove nails. 

  • A supervisor whose reliance on a subordinate's analysis is so complete as to render him or her liable for the subordinate's animus or other misconduct towards a third employee. 

  • A twisting variant of the lark's-foot hitch which forms two small bights used to hook a pair of tackles to a rope. 

  • Someone or something that comes down quickly upon a victim in the manner of a cat's paw. 

  • A minor breeze that ripples the surface of a body of water. 

  • Someone who acts in another's interest, (properly) unknowingly or through trickery. 

  • Any of several species of Australian bloodworts of the genus Anigozanthos, especially A. humilis. 

How often have the words bloodwort and cat's-paw occurred in a corpus of books? (source: Google Ngram Viewer )