user: Question: how many original air date where family/families is The Ryder Family and The Schwartz Family
Columns: ['No. overall', 'No. in series', 'Family/families', 'Location(s)', 'Original air date']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['UK36', 1.0, 'The Murphy Family and The Laws Family', 'North London & High Wycombe', '6July2011']
SQL:

assistant: SELECT COUNT("Original air date") FROM "Table" WHERE "Family/families" = 'The Ryder Family and The Schwartz Family';