elation vs halcyon days

elation

noun
  • An exhilarating psychological state of pride and optimism. 

  • A feeling of joy and pride. 

  • A collineation that fixes all points on a line (called its axis) and all lines though a point on the axis (called its center). 

halcyon days

noun
  • A period of calm, usually in the past and often nostalgic. 

  • Period of calm during the winter, when storms do not occur. 

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