CREATE TABLE table_20613 ("Missouri vs." CLOB, "Overall Record" CLOB, "at Columbia" CLOB, "at Opponents Venue" CLOB, "at Neutral Site" CLOB, "Last 5 Meetings" CLOB, "Last 10 Meetings" CLOB, "Current Streak" CLOB, "During Time in Big 12" CLOB)

Name the total number of opponets venue for oklahoma
SELECT COUNT("at Opponents Venue") FROM table_20613 WHERE "Missouri vs." = 'Oklahoma'
SELECT COUNT("at Opponents Venue") FROM "table_20613" WHERE "Missouri vs." = 'Oklahoma'