It won't be readily available, you could try contacting Xbox Support to see what the duration might be once the gamertag is changed on the original account. I know the duration for inactive accounts is 5 years and then the gamertag can be used again. For
name changed ones, I heard is shorter just don't know how long you'd have to wait.
Was this reply helpful?
Sorry this didn't help.
Great! Thanks for your feedback.
How satisfied are you with this reply?
Thanks for your feedback, it helps us improve the site.