Anyone know how frequently subeautique refreshes stock? I'd like to try and get some of the newer things that have been released, but I don't know when or how frequently I should be checking :^|a

I'm not sure exactly how often, but it's definitely multiple times a day.

I check every 2 minutes or so, and that's not quick enough to grab the newest items.

It does NOT reset every 2 minutes - more like 20-35 minutes, but if you don't catch a restock as soon as it happens the new stuff is just gone. It will restock 9 items with one or two copies of each. I've managed to catch restocks when all 9 items are there, with a pile of 2 items, click and still get the error "there are not enough in stock to buy that." So you need to be both quick and lucky.

It restocks roughly every 30 to 40 minutes, but it's not exact. So if you're trying to snag some items, you must refresh at the beginning of every minute. For example, right now it's 4:00:00pm Subeta time. I would refresh at 4:01:00 to about 4:01:04. Then I would wait until the next minute rolls around to 4:02:00 to 4:02:04. If it doesn't restock by the fourth second of the minute, you have about a minute break to check again.

If it restocks at 4:01:03, you can take a bit of a break before refreshing again, as it most likely won't restock for 30 minutes or more. There are exceptions, so that's just an estimate.