What is the word for theatre that takes multiple nights to perform the entire story?

Some plays are typically performed in installments over multiple nights for the same audience, because a single night is not adequate for the entire story to be told. What is the theatre terminology that describes this—either a word for these type of plays, or the process of performing them over multiple nights? I’m not sure of the part or parts of speech of this word.

Examples:

They will be performing Wagner’s Ring cycle as [word]—during the evening from Thursday to Sunday—because who has the patience to watch fifteen hours of opera in one sitting?

I wouldn’t watch Tony Kushner’s Angels in America in [word]; I would rather watch both parts in the same night.