CREATE TABLE table_931 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Stadium" TEXT, "Record" TEXT, "Attendance" FLOAT)

how many attendance with stadium being cotton bowl
SELECT COUNT("Attendance") FROM table_931 WHERE "Stadium" = 'Cotton Bowl'
SELECT COUNT("Attendance") FROM "table_931" WHERE "Stadium" = 'Cotton Bowl'