user: Question: When did the woman, who was married 22 May 1657, cease to be the duchess?
Columns: ['Name', 'Father', 'Birth', 'Marriage', 'Became Duchess', 'Ceased to be Duchess', 'Death', 'Spouse']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ["Charlotte d'Orléans", 'Louis, Duke of Longueville (Orléans)', '1 November 1512', '8 September 1549', '8 September 1549', '25 November 1533', '8 September 1549', 'Philippe']
SQL:

assistant: SELECT "Ceased to be Duchess" FROM "Table" WHERE "Marriage" = '22 May 1657';