Chopin had a free sense of rhythm.  In 1842, Chopin was giving a lessen to Wilhem von Lenz when Meyerbeer walked in.  The Mazurka (op. 33 no. 3) was being played.  von Lenz recounts: Meyerbeer had seated himself; Chopin let me play on. “That is two-four time,” said Meyerbeer. For reply, Chopin made me repeat,…