user: Question: How many dates did the episode with a production code of 804 originally air on?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real']
Sample row: [179.0, 1.0, '"Bohemian Rhapsody"', 'David Trainer', 'Gregg Mettler', 'November2,2005', 801.0]
SQL:

assistant: SELECT COUNT("Original air date") FROM "Table" WHERE "Production code" = 804.0;