convulsion vs glee

convulsion

noun
  • An uncontrolled fit, as of laughter; a paroxysm. 

  • An intense, paroxysmal, involuntary muscular contraction. 

  • Violent turmoil. 

glee

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

noun
  • Music; minstrelsy; entertainment. 

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

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

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