dead set vs tall order

dead set

noun
  • A determined effort. 

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

  • A pointed and persistent attack on a person. 

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

adj
  • Unswervingly dedicated; resolutely determined. 

  • Complete and utter; total. 

tall order

noun
  • A big job; a difficult challenge. 

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