discourage vs substantiate

discourage

verb
  • To extinguish the courage of; to dishearten; to depress the spirits of; to deprive of confidence; to deject. 

  • To persuade somebody not to do (something). 

noun
  • Lack of courage 

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 discourage and substantiate occurred in a corpus of books? (source: Google Ngram Viewer )