CREATE TABLE table_202_45 (id DECIMAL, "rank" DECIMAL, "wrestler" TEXT, "no. of reigns" DECIMAL, "combined days" DECIMAL)

how long did orville brown remain nwa world heavyweight champion ?
SELECT "combined days" FROM table_202_45 WHERE "wrestler" = 'orville brown'
SELECT "combined days" FROM "table_202_45" WHERE "wrestler" = 'orville brown'