CREATE TABLE table_204_269 (id DECIMAL, "week" DECIMAL, "room" TEXT, "winning couple" TEXT, "2nd couple" TEXT, "3rd couple" TEXT, "chumps" TEXT)

how many weeks were chantelle and steve the 3rd couple ?
SELECT COUNT("week") FROM table_204_269 WHERE "3rd couple" = 'chantelle and steve'
SELECT COUNT("week") FROM "table_204_269" WHERE "3rd couple" = 'chantelle and steve'