That depends on the freezer and how well the shrimp is packaged. It could keep from 6 months to a year.
The only way I know of to remove freezer burn is to cut out the effected pieces.
I don't know about you, but I feel worse in the freezer!
I think if you keep your hand long enough in a freezer it can get frost bite, but no. You can not get freezer burn from touching a freezer. That requires a long peorid of time.
A long time
until the freezer breaks down until the freezer breaks down
2 weeks
2 hours
If the shrimp was bought frozen in the bag look for the expiration date. If not, just assume 1 month long, because that's usually the time it takes for seafood to expire.
Watermelons do not like the freezer. If you put it in you can leave it in there for as long as you want, as long as you don't plan to enjoy it later on.
About a week in a half
It might be. So much depends on the quality of the shrimp before it was frozen and how it has been handled since. You will have to make the decision yourself. If it isn't slimy, watery, or mushy and doesn't have any off-odors, it might be OK to use. In reality, it is getting towards the end of how long you should keep it.