at a premium vs reasonable

at a premium

prep
  • At a high, or higher than expected, price. 

  • Scarce, in short supply. 

  • Above par value. 

reasonable

adj
  • Just; fair; agreeable to reason. 

  • Satisfactory. 

  • Not excessive or immoderate; within due limits; proper. 

  • Not expensive; fairly priced. 

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