CREATE TABLE table_61751 ("Team" TEXT, "Outgoing manage" TEXT, "Manner" TEXT, "Date of vacancy" TEXT, "Incoming manager" TEXT, "Date of appointment" TEXT)

What was the day of vacancy for vit ria de guimar es?
SELECT "Date of vacancy" FROM table_61751 WHERE "Team" = 'vitória de guimarães'
SELECT "Date of vacancy" FROM "table_61751" WHERE "Team" = 'vitória de guimarães'