Batching is a feature provided by us to allow you to skill in batches rather than one by one.

The way it works is simple, the higher level you are in the skill you are training, more batches you can do.
The formula is: max-stat of skill you are leveling / 10

There is a progress bar in-game which displays time remaining for current action and "amount completed / total batch amount"

You can turn on, or off this progress bar from options