Hello there!
"the amount of time avilable to you never changes" would signify that the time for the person that this person is stating doesn't have any change of the (spare) and extra time that they
For example: If I had a friend that came over my house every day @ 2. I can be able to tell him that his extra time doesn't change because he's going over my house every day @ 2.
This is what this sentence what identify.
