glee vs lyrics

glee

noun
  • An unaccompanied part song for three or more solo voices, not necessarily merry. 

  • Music; minstrelsy; entertainment. 

  • Joy; happiness; great delight, especially from one's own good fortune or from another's misfortune. 

verb
  • To sing a glee (unaccompanied part song). 

lyrics

noun
  • The words to a song (or other vocal music). 

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