austere vs grim

austere

adj
  • Grim or severe in manner or appearance 

  • Lacking decoration; trivial; not extravagant or gaudy 

grim

adj
  • Ghastly or sinister. 

  • Rigid and unrelenting. 

  • Disgusting; gross. 

  • Dismal and gloomy, cold and forbidding. 

verb
  • To make grim; to give a stern or forbidding aspect to. 

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