individual vs substantial

individual

noun
  • An element belonging to a population. 

  • An object, be it a thing or an agent, as contrasted to a class. 

  • A person considered alone, rather than as belonging to a group of people. 

  • A single physical human being as a legal subject, as opposed to a legal person such as a corporation. 

adj
  • Intended for a single person as opposed to more than one person. 

  • Not divisible without losing its identity. 

  • Relating to a single person or thing as opposed to more than one. 

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 individual and substantial occurred in a corpus of books? (source: Google Ngram Viewer )