Mine is every Monday, which I go over in this thread.
Everyone does everything differently, every tank is different but I'll sum mine up for you and if you have any questions just fire away.
I change 15 gallons of water every Monday.
I clean my skimmer every 3 days. Top only, whole thing every 3 months.
Clean sock when full. About every 3 days.
I test 3 things every week.
Phos, nitrate and alk.
Sometimes I test nitrate before and after water change.
I'll replace carbon in reactor weekly, gfo when test is higher than I like.
Scrape algae scrubber every other week.
My tank has been going 7-8 years or so. Nothing much happens and it really takes me longer to arrange all my buckets of water than maintain unless I spill everywhere or decide to do something I don't need to and then undo that back to original.

I clean my wave makers monthly.
That's important for longevity. I hate buying new stuff cuz I'm lazy.