antiquity vs halcyon days

antiquity

noun
  • Ancient times; faraway history; former ages 

  • A relic or monument of ancient times, such as a coin, a statue, etc.; an ancient institution. 

  • The people of ancient times. 

  • The historical period preceding the Middle Ages (c. 500-1500), primarily relating to European history. 

  • The state of being ancient or of ancient lineage. 

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 antiquity and halcyon days occurred in a corpus of books? (source: Google Ngram Viewer )