timeframe_group_id,start_time,end_time,service_id
peak,08:00:00,12:00:00,weekday
peak,16:00:00,21:00:00,weekday
offpeak,00:00:00,08:00:00,weekday
offpeak,12:00:00,16:00:00,weekday
offpeak,21:00:00,24:00:00,weekday
peak,08:00:00,12:00:00,monday
peak,16:00:00,21:00:00,monday
offpeak,00:00:00,08:00:00,monday
offpeak,12:00:00,16:00:00,monday
offpeak,21:00:00,24:00:00,monday
offpeak,00:00:00,24:00:00,sunday
offpeak,00:00:00,24:00:00,holiday
