pinion vs pintail

pinion

noun
  • Any of the outermost primary feathers on a bird's wing. 

  • The smallest gear in a gear train. 

  • A moth of the genus Lithophane. 

  • The joint of a bird's wing farthest from the body. 

  • A wing. 

verb
  • To restrain; to limit. 

  • To cut off the pinion of a bird’s wing, or otherwise disable or bind its wings, in order to prevent it from flying. 

  • To bind the arms of someone, so as to deprive him of their use; to disable by so binding. 

pintail

noun
  • A pintail duck, a type of dabbling duck with a characteristic pointed tail. 

  • Any of various species of libellulid dragonfly of the genus Acisoma, endemic to Africa and Asia. 

  • A surfboard with a pointed back end. 

  • A pin-tailed snipe, Gallinago stenura. 

  • The end of a fastening pin or mandrel on a Huckbolt or pop rivet that is broken off when installation is complete. 

  • A northern pintail, Anas acuta, a dabbling duck of the northern hemisphere that has a long pointed tail. 

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