I count the time when I can move at first, and when the little freeze became at the end.

1. 34.89 -> 7.10 = 6.76
2. 7.59 -> 14.32 = 6.73
3. 15.24 -> 20.30 = 5.06
4. 32.59 -> 38.43 = 5.84 Total = 24.39

mod note:

That is not how timing works. Timing is done by adding together all the in-game times that are shown after each individual battle. This gives us the following:

6:30 + 6:27 + 4:38 + 5:34 = 23:12