glee vs ragtime

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). 

ragtime

noun
  • A piece of music in this style. 

  • A musical form having a rhythm characterized by strong syncopation in the melody with a regularly accented accompaniment. 

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