pet vs substantial

pet

noun
  • Something kept as a companion, including inanimate objects. (pet rock, pet plant, etc.) 

  • One who is excessively loyal to a superior and receives preferential treatment. 

  • A fit of petulance, a sulk, arising from the impression that one has been offended or slighted. 

  • An animal kept as a companion. 

  • Any person or animal especially cherished and indulged; a darling. 

  • A term of endearment usually applied to women and children. 

adj
  • Favourite; cherished; the focus of one's (usually positive) attention. 

  • Kept or treated as a pet. 

verb
  • To stroke or fondle (another person) amorously. 

  • To stroke or fondle (an animal). 

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