It depends on how long you have the piercing/ how healed it is. If you have it for longer than a year and it is all healed, it will usually stay open for awhile. Your tragus is just like the cartilage on the outer rim of your ear.
About 10-15 minutes
It takes as long as it takes once a piercing has healed it depends on haow long you leave the jewellery out, if you are done with the piercing it can take a few days to several weeks for the piercing to actually close once it's a seasoned piercing (seasoned being over a year old).
Usually 6-8 weeks you should wait to make sure it is fully healed
Your professional body piercer should have told you that you can expect to wait 8 to 10 weeks for a light heal and over a year for the piercing to season up and be considered a healed piercing.
You shouldn't remove any piercing until after they are entirely healed. If the piercing is already infected, removing the jewelery could cause the piercing to heal over trapping the infection inside the skin which will require medical attention. But if you don't have a choice, or you've decided that you don't want the piercing anymore, (only if the piercing is NOT infected) you can take the piercing out to let it grow over, and as long as you continue aftercare until the piercing is entirely healed you shouldn't get an infection.
of course! but it will close
If healed you should just be able to unscrew and take it out and in. If not healed you will irritate the piercing and end up with a messed up or even infected piercing. Can you not just cover the area with a soft bandage& tape? cover it all to avoid it getting rubbed?
Well nothing then again you could loose the piercing. Don't mess around with your piercing unless you have decided to go without it, then take it out and leave it out. Screwing around with a piercing that isn't healed is inviting infection, tearing and other nasty things to happen to a new piercing just because you were curious.
It really depends on the type of piercing and long you've had the piercing.
You should clean your nose piercing with antibacterial (Dial) soap twice a day for the first week that you have it. After that first week, reduce cleaning to once a day. Be sure not to overclean as you can cause moderate to severe irritation to your piercing.
This is subjective to the area of the piercing. If it is trans urethral, in the instance of a PA or an apadravya, than it will never fully close. It could be anywhere from a day to a few...or in some instances a week or so if it is well and truly healed.