glee vs yodel

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). 

yodel

noun
  • A song incorporating yodelling. 

  • An act of yodelling. 

verb
  • To sing (a song) in such a way that the voice fluctuates rapidly between the normal chest voice and falsetto. 

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