Terpsichore, the muse that comes and goes.

Muses come and go very quickly, especially Terpsichore.

But as my friend Laurel Grey pointed out, Clio is forever. 

In the Fred Astaire/Gubger Rigers feature film Swing Time (1936), Lucky (Astaire), when asked by Mr. Gordon, why he wishes to learn to dance, answers: "To flirt with terpsichory"