user: Question: How many stations are transmitted on frequency 7 UHF?
Columns: ['Television Station', 'Frequency', 'Site', 'Transmitted', 'Network', 'Status', 'Country of Region']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['TV1', '28 UHF', 'Gunung Ledang', '10 kW/800 kW ERP', 'Radio Televisyen Malaysia (RTM)', 'National', 'Malaysia']
SQL:

assistant: SELECT COUNT("Transmitted") FROM "Table" WHERE "Frequency" = '7 UHF';