regret vs relief

regret

noun
  • Emotional pain on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing. 

  • The amount of avoidable loss that results from choosing the wrong action. 

verb
  • To feel sorry about (a thing that has or has not happened), afterthink: to wish that a thing had not happened, that something else had happened instead. 

  • To feel sorry about (any thing). 

relief

noun
  • The feeling associated with the removal of stress or discomfort. 

  • Release from a post or duty, as when replaced by another. 

  • A type of sculpture or other artwork in which shapes or figures protrude from a flat background. 

  • A certain fine or composition paid by the heir of a tenant upon the death of the ancestor. 

  • A lowering of a tax through special provisions; tax relief. 

  • The apparent difference in elevation in the surface of a painting or drawing made noticeable by a variation in light or color. 

  • Aid or assistance offered in time of need. 

  • The removal of stress or discomfort. 

  • The supposed projection of a charge from the surface of a field, indicated by shading on the sinister and lower sides. 

  • Court-ordered compensation, aid, or protection, a redress. 

  • The person who takes over a shift for another. 

  • The difference of elevations on a surface. 

adj
  • Characterized by surface inequalities. 

  • Of or used in letterpress. 

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