strengthening vs terrible

strengthening

noun
  • The process by which something is strengthened. 

terrible

adv
  • In a terrible way; to a terrible extent; terribly; awfully. 

adj
  • Intense; extreme in degree or extent. 

  • Dreadful; causing terror, alarm and fear; awesome 

  • Formidable, powerful. 

  • Unpleasant; disagreeable. 

  • Very bad; lousy. 

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