dead set vs obdurate

dead set

adj
  • Unswervingly dedicated; resolutely determined. 

  • Complete and utter; total. 

noun
  • The rigid pose a hunting dog assumes when pointing out game to a hunter. 

  • A determined effort. 

  • A pointed and persistent attack on a person. 

  • A fixed or stationary condition arising from obstacle or hindrance; a deadlock. 

obdurate

adj
  • Stubbornly persistent, generally in wrongdoing; refusing to reform or repent. 

  • Hardened against feeling; hard-hearted. 

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