oblong vs oviform

oblong

adj
  • Roughly rectangular or elliptical. 

  • Having the horizontal axis of a page longer than the vertical; In landscape orientation. 

  • Having a length and width that are different; not square or circular. 

verb
  • To give an oblong shape to. 

  • To extend so as to form an oblong shape. 

noun
  • A rectangle with length and width that are different. 

  • An ellipse with minor and major axes that are different. 

  • Something with an oblong shape. 

oviform

adj
  • egg-shaped 

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