When do you see your friends? I see them every day / at weekends / on Saturdays.
When do you help your mum? I help her every day / at weekends / on Saturdays.
When does your grandma visit you? She visits us every day / at weekends / on Saturdays.
When do you eat breakfast? I eat it every day / at weekends / on Saturdays.
When does your best friend phone you? He phones me every day / at weekends / on Saturdays.