CREATE TABLE table_204_721 (id DECIMAL, "rank" DECIMAL, "wrestler" TEXT, "no. of reigns" DECIMAL, "combined\ defenses" DECIMAL, "combined\ days" DECIMAL)

how many days combined did kevin steen had
SELECT "combined\ndays" FROM table_204_721 WHERE "wrestler" = 'kevin steen'
SELECT "combined\ndays" FROM "table_204_721" WHERE "wrestler" = 'kevin steen'