user: Question: What is the frequency of number 3 with a Bus station origin?
Columns: ['Number', 'Origin', 'Final destination', 'Frequency', 'Distance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Bryngelstorp', 'Harg', 'Every 15 minutes', 'km (mi)']
SQL:

assistant: SELECT "Frequency" FROM "Table" WHERE "Origin" = 'Bus station' AND "Number" = 3.0;