A ballade is "a poem normally composed of three stanzas and an envoi. The last line of the opening stanza is used as a refrain, and the same rhymes, strictly limited in number, recur throughout".
Usage
See Special:Whatlinkshere/Etymology:Ballade for a list of articles using this term.
This is an etymology page: a page detailing the origins of terminology used in the series in regards to real world culture and history.