How often do you change your litter box?

Trying to create a chore chart for my and my SO, because honestly I’m a slacker 🤷🏼‍♀️ this poor man does a lot of work at home and he works 10 hour days, 6 days a week. And I legitimately feel bad because I honestly (swear on everything) try to help as much as possible, but I literally ALWAYS forget. He can ask me to do some laundry or change the litter box and it’s like 20 mins later I completely forget about it, and he just goes and does it himself. So I’m making a chore chart so it’s right there in front of me to remind me to do my part. So how often do you change your litter box, I know it depends on how many cats, how often they go, etc. but I’m just wondering the general rule. We have 5 cats, 3 are adults so they also go outside to go to the bathroom too so it’s mainly used by 2 kittens, and the adults use it when they’re inside at night. I actually changed ours on Tuesday and then I changed it just now (Saturday) so I’m thinking twice a week is a good rule of thumb?