Rondo is a piece in which one principal subject is repeated several times (in a so called refrain), and is divided by various couplets. Chopin used this musical form with inherent ingenuity.
Rondo a la Mazur in F Major, Op. 5
Rondo a la Krakowiak in F Major, Op. 14
Rondo in C Major for 2 pianos, Op. 73