user: Question: What many times was the Victoria Derby raced?
Columns: ['Result', 'Date', 'Race', 'Venue', 'Group', 'Distance', 'Weight (kg)', 'Jockey', 'Winner/2nd']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['6th', '30 Aug 2003', 'HDF McNeil Stakes', 'Caulfield', 'G3', '1100 m', '54', 'P. Mertens', '1st - Cahuita']
SQL:

assistant: SELECT COUNT("Date") FROM "Table" WHERE "Race" = 'Victoria Derby';