feature vs substantial

feature

noun
  • An important or main item. 

  • An individual measurable property or characteristic of a phenomenon being observed; the input of a model. 

  • A beneficial capability of a piece of software. 

  • Any of the physical constituents of the face (eyes, nose, etc.). 

  • The act of being featured in a piece of music. 

  • Characteristic forms or shapes of parts. For example, a hole, boss, slot, cut, chamfer, or fillet. 

  • A long, prominent article or item in the media, or the department that creates them; frequently used technically to distinguish content from news. 

  • Something discerned from physical evidence that helps define, identify, characterize, and interpret an archeological site. 

  • The elements into which linguistic units can be broken down. 

  • The cast or structure of anything, or of any part of a thing, as of a landscape, a picture, a treaty, or an essay; any marked peculiarity or characteristic. 

verb
  • To appear, to make an appearance. 

  • To ascribe the greatest importance to something within a certain context. 

  • To star, to contain. 

substantial

noun
  • Anything having substance; an essential part. 

adj
  • Most important; essential. 

  • Not imaginary; real; actual; true; veritable. 

  • Having a substance; actually existing. 

  • Corporeal; material; firm. 

  • Possessed of goods or an estate; moderately wealthy. 

  • Satisfying; having sufficient substance to be nourishing or filling. 

  • Large in size, quantity, or value; ample; significant. 

  • Having good substance; strong; stout; solid; firm. 

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