childe vs sprog

childe

noun
  • A child of noble birth. 

  • The cognomen given to the oldest son prior to his taking his father's title. 

sprog

noun
  • A child. 

  • A new recruit. 

  • A deflection-limiting safety device used in high performance hang gliders. 

verb
  • To produce children. 

  • To ejaculate, to come. 

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