incorporate vs interpolate

incorporate

verb
  • To include (something) as a part. 

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

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

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

  • Not incorporated; not existing as a corporation. 

interpolate

verb
  • To introduce (something) between other things; especially to insert (possibly spurious) words into a text. 

  • During the course of processing some data, and in response to a directive in that data, to fetch data from a different source and process it in-line along with the original data. 

  • To estimate the value of a function between two tabulated points. 

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