Hello, I want to schedule a flow all 7 days a week, but on weekend want to reduce the run frequency to every 4 hours once instead of every one hour. This is the pice of code for all 7 days week to run every 1 hr from 6 am to 6 pm which needs modification for weekend schedule.                                                                                                                                                schedule = Schedule(
    # emit an event every hour
    clocks=[
        IntervalClock(
        start_date=pendulum.datetime(2021, 4, 1, tz="America/Los_Angeles"),
        interval=timedelta(hours=1))         
        ],
    
    # only include weekdays
    #filters=[filters.is_weekday],

    # only include 6am and 6pm
    filters=[
        filters.between_times(time(6), time(18))
    #    filters.between_times(time(6), time(18))
    ]
)

from prefect.schedules.clocks import CronClock

week = CronClock(cron="0 6-18 * * 1-5")
weekend = CronClock(cron="0 6-18/4 * * 0,6")

clocks = [week, weekend]

1-5

*/4

0,6