CREATE TABLE table_204_947 (id DECIMAL, "week" DECIMAL, "date" TEXT, "opponent" TEXT, "result" TEXT, "attendance" DECIMAL)

in 1974 the chiefs played the denver broncos a total of how many times ?
SELECT COUNT(*) FROM table_204_947 WHERE "opponent" = 'denver broncos'
SELECT COUNT(*) FROM "table_204_947" WHERE "opponent" = 'denver broncos'