actualize vs substantiate

actualize

verb
  • To make real; to realize. 

  • To become actual or real. 

  • To realize one's full potential. 

substantiate

verb
  • To give material form or substance to something; to embody; to record in documents 

  • To verify something by supplying evidence; to authenticate or corroborate 

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