annular vs elliptical

annular

adj
  • Pertaining to, or having the form of, a ring; ring-shaped; in the shape of an annulus. 

  • Banded or marked with circles. 

elliptical

adj
  • In a shape of, or reminding of, an ellipse; oval. 

  • Elliptic. 

  • Concise, condensed. 

  • Of, or showing ellipsis; having a word or words omitted. 

noun
  • An elliptical trainer. 

  • An elliptical galaxy. 

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