[Product Question] How much is too much per day? Both for AHA and BHA. Is using 2% BHA 1x per day the same idea as using 1% 2x per day?

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I've asked a similar question in the past but I'd like to clarify in case the responses I got were assuming a 1x per day application.My old question was, how much AHA is too much daily? Most responses seemed to suggest anything above 8% is too much for every day use. I realized though, that many people use acids both morning and night, which would increase the total amount per day.So my new, clarified question is:-what is the max percentage I should be using if I'm only using an acid 1x per day? (how much bha, how much aha) -what is the max percentage I should be using if I'm using the same product but twice in one day? (again, how much of each)I had a hard time wording this question properly so I hope it makes sense! Thanks in advance for any replies :)
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Submitted by kd2186