CREATE TABLE table_2675 ("Year" TEXT, "Date" TEXT, "Driver" TEXT, "Team" TEXT, "Manufacturer" TEXT, "Laps" TEXT, "Miles  ( km ) " TEXT, "Race time" TEXT, "Average speed  ( mph ) " TEXT, "Report" TEXT)

On how many dates was the average speed of the race 91.033 MPH?
SELECT COUNT("Date") FROM table_2675 WHERE "Average speed (mph)" = '91.033'
SELECT COUNT("Date") FROM "table_2675" WHERE "Average speed (mph)" = '91.033'