user: Question: On how many dates was the average speed of the race 91.033 MPH?
Columns: ['Year', 'Date', 'Driver', 'Team', 'Manufacturer', 'Laps', 'Miles (km)', 'Race time', 'Average speed (mph)', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1961', 'October 22', 'Joe Weatherly', 'Bud Moore Engineering', 'Pontiac', '500', '250 (402.336)', '3:27:02', '72.452', 'Report']
SQL:

assistant: SELECT COUNT("Date") FROM "Table" WHERE "Average speed (mph)" = '91.033';