scutum vs stirrup

scutum

noun
  • A scute. 

  • The kneecap. 

  • One of the two lower valves of the operculum of a barnacle. 

  • An oblong shield made of boards or wickerwork covered with leather, with sometimes an iron rim; carried chiefly by the heavily armed infantry of the Roman army. 

  • A shield-like protection, such as the scutum protecting the back of a hard tick (cf. alloscutum, conscutum) 

stirrup

noun
  • A stapes. 

  • Any piece shaped like the stirrup of a saddle, used as a support, clamp, etc. 

  • A portable, flexible ladder-like device used in climbing. 

  • A rope secured to a yard, with a thimble in its lower end for supporting a footrope. 

  • A ring or hoop suspended by a rope or strap from the saddle, for a horseman's foot while mounting or riding. 

adj
  • Referring to women's pants/trousers: being of a form, commonly worn by women, that includes a strap beneath the arch of the foot. 

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