incorporate vs naturalize

incorporate

verb
  • To unite with a material body; to give a material form to; to embody. 

  • To mix (something in) as an ingredient; to blend 

  • To admit as a member of a company 

  • To form into a legal company. 

  • To include (another clause or guarantee of the US constitution) as a part (of the Fourteenth Amendment, such that the clause binds not only the federal government but also state governments). 

  • To include (something) as a part. 

  • To form into a body; to combine, as different ingredients, into one consistent mass. 

adj
  • Not consisting of matter; not having a material body; incorporeal; spiritual. 

  • Not incorporated; not existing as a corporation. 

naturalize

verb
  • To acclimatize an animal or plant. 

  • To make (a word) a natural part of the language, using the native homologue of each phoneme (and often for each morpheme) of the imported word (e.g., native inflections). 

  • To study nature. 

  • To limit explanations of a phenomenon to naturalistic ones and exclude supernatural ones. 

  • To grant citizenship to someone not born a citizen. 

  • To make natural 

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