luxury vs substantial

luxury

adj
  • not essential but desirable and enjoyable and indulgent. 

  • very expensive 

  • Pertaining to the top-end market segment for mass production mass market vehicles, above the premium market segment. 

noun
  • Very wealthy and comfortable surroundings. 

  • Something desirable but expensive. 

  • Something that is pleasant but not necessary in life. 

substantial

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

  • 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. 

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

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

noun
  • Anything having substance; an essential part. 

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