forthcome vs materialize

forthcome

verb
  • To come forth. 

materialize

verb
  • To take physical form, to appear seemingly from nowhere. 

  • To cause to take physical form, or to cause an object to appear. 

  • To regard as matter; to consider or explain by the laws or principles which are appropriate to matter. 

  • To perform materialization; to save the results of a database query as a temporary table or materialized view. 

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