repetition; refrain; accumulative clause
A literary term for a repeated phrase or clause, especially in classical Japanese poetry or prose. Can refer to a refrain or a cumulative rhetorical device. Rare in everyday language.
In this waka poem, a refrain is used effectively.
You may come across the term 畳句 in commentaries on classical literature.
畳 (じょう, 'to pile up, repeat') + 句 (く, 'phrase, clause'). The exact historical derivation is uncertain, but the term is used in traditional Japanese poetics and rhetoric.