How often "are" you "showering"???

Both variations are correct

I think "How often do you shower" is correct for routines. "How often are you showering" sounds like you're asking about their shower schedule this week specifically.

Both are fine (especially when spoken). However, your version is technically more accurate (when written).

Both seem fine, for example swap in a verb like ‘work’ and it sounds more natural. “How often are you working?” might be a normal question for two people catching up. Your way is a little cleaner and more concise though

Both versions are useable, but it’s about how passively you’re asking the question. “Do” is more active than “are”.

“How often are you showering?” would be very unusual for an English person to say, although we would understand it as maybe an American dialect thing.

Either is correct and they both mean approximately the same thing. Which one a native speaker would use depends on context.

Both work! “Are you” sounds like something a doctor or therapist would ask, imo. It’s a little formal and would be appropriate if gauging someone’s willingness/ability to shower. “I used to shower daily but lately it’s been once or twice a week.” “Do you” is more direct, the asker is probably expecting a quick response like ‘every other day.’

The present continuous version sounds more youthful, vibey, and high-energy online health influencer to me. But both are fine and correct.

Daily in the summer, every other day or less often in colder months

here's another usage pattern i haven't seen anyone mention yet. "how often are you Xing and then Y happens" means "how often does Y happen while you are Xing". > How often are you showering, and then you realize there's a dirty chore you forgot to do? If this has happened to you, how do you handle it? Do you get out immediately to complete the chore, and then maybe you shower again afterwards? Do you finish your shower? Do you just put off the chore even though it really needs to be done?

There are specific contexts where "How often are you showering?" would be preferred. Let's say you're at summer camp and you want to know how often someone has been showering at the camp. "How often do you shower?" would be taken as more of a regular schedule, outside of the camp. "How often are you showering?" or "How often have you been showering?" would be specific for the current context.

Once a month

“Are you showering” emphasizes the action of showering sort of like if at any moment I checked on you what are the odds you would be showering at that moment. While “do you shower” is more focused on each time you do it treating an hour shower and a 10 minute shower the same while “are you showering” would treat them differently.

Twice a day immediately after waking up and after dinner and dessert

The first is more something you’d ask when they stink and in an accusatory manner

Yes, both are grammatically correct; they just sound a bit different in tone and intent

Both are valid. For example: are you showering?  Yes, I'm showering. Are you sleeping?  I am sleeping.  Are you taking a nap?  I am taking a nap. (Also, I am napping.) Are you running?  I'm running.  Are you going for a run?  I am going for a run.  Are you hiking?  I am hiking. (Though usually you'd add on where you're hiking. Like I'm hiking in the Everglades.)

I'd assume with 'how often are you showering' that there was some sort of change of circumstances that meant that you may be showering more or less than usual. For example, if it was during a heatwave, you may be showering a lot more than usual, so 'how often are you showering' would give more of an indication that it was a temporary change