CREATE TABLE table_204_947 (id NUMBER, "week" NUMBER, "date" CLOB, "opponent" CLOB, "result" CLOB, "attendance" NUMBER)

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'