CREATE TABLE table_59576 ("Name" TEXT, "Father" TEXT, "Birth" TEXT, "Marriage" TEXT, "Became Duchess" TEXT, "Ceased to be Duchess" TEXT, "Death" TEXT, "Spouse" TEXT)

When did the woman, who was married 22 may 1657, cease to be the duchess?
SELECT "Ceased to be Duchess" FROM table_59576 WHERE "Marriage" = '22 may 1657'
SELECT "Ceased to be Duchess" FROM "table_59576" WHERE "Marriage" = '22 may 1657'