As it is, this plan assumes one session per day. So yes, you would do session 6 the next day. And it should take you a minimum of 39 days to complete this piece working on it 15 – 20 minutes a day. (more if you need to repeat the same session several days in a row – which is a common occurrence).
Could you do it in less than 39 days? Sure. Just dedicate more than one practice session per day to different sections. Here is a plan that will get you there in 18 days minimum. The session times in brackets represent “joined” sections that can often be mastered in a fraction of the time of a totally new session, so you should be able to tackle more than one of those in a single session of 15 – 20 minutes:
(you must renumber all sessions from 1 to 39 for what follows to make sense):
Day 1: session 1 – session 2 – session 3 (3 practice sessions/day)
Day 2: [session 4] – session 5 (2 practice sessions/day)
Day 3 – [session 6] – session 7
Day 4 – [session 8] – session 9
Day 5 – [session 10] Session 10 – session 11 – session 12 – session 13 (4 practice sessions/day)
Day 6: [Session 10 – session 14] - session 15 (2 practice sessions /day)
Day 7: [Session 10 – session 16] – session 17 (2 practice sessions/day)
Day 8: [Session 10 – session 18] – session 19
Day 9: [Session 10 – session 20] – session 21
Day 10: [Session 10 – session 22 – session 23
Day 11: [Session 10 – session 24] – session 25 - session 26
Day 12: [Session 10 – session 24 – session 27] – session 28 (2 practice sessions)
Day 13 : [Session 10 – session 24 - session 29] – session 30
Day 14: [session 10 – session 24 - session 31] - session 32
Day 15: [session 10 – session 24 – session 33] - session 34
Day 16: [session 10 – session 24 – session 35] - session 36
Day 17: [session 10 – session 24 – session 37] – session 38
Day 18: [session 10 – session 24 – session 39]
By day 18, have you noticed how mush you will have practised sessions 10 (the whole piece in motifs) and session 24 (the whole piece separate hands)? This means that it should take you only a couple of minutes to run through them on day 18, and you will have most of the practice session to do session 39. Does that make sense?
But let us say that you are really in a hurry. Here is a 12 day plan:
Day 1: session 1 – session 2 – session 3 (3 practice sessions/day)
Day 2: [session 4] – session 5 – [session 6](3 practice sessions/day)
But isn’t session 6 a repeat of session 5 and shouldn’t I leave one night sleep in between materials. Sure, but you are in a hurry, remember? And – as I am sure you experienced this before, even though you may have mastered session 4 and session 5, when you put them together as session 6 it will feel like a whole new animal. So just treat it as new material. Not the best way to go about it, but not impossible. It all depends what will happen the next days. If it keeps falling apart, then it was not a good idea. But if you can cope with it, then go for it by all means. None of this is written in stone. These are just general principles that must be applied to each individual. The final arbiter is your progress, it is as simple as that: if you are progressing, you are doing the right thing. If you are not progressing you must do something else.
Day 3 – [session 6] – session 7 – [session 8] – session 9 - [session 10] (5 practice sessions).
Day 4 – [Session 10] – session 11 – session 12 – session 13 (4 practice sessions/day)
Day 5: [Session 10 – session 14] - session 15 – [session 16] – session 17 (4 practice sessions/day)
Day 6: [Session 10 – session 18] – session 19 - [session 20] – session 21
Day 7: [session 10 – session 22] – session 23 – session [24]
Day 8: [Session 10 – session 24] – session 25 - session 26 – [session 27]
Day 9: [Session 10 – session 24 – session 27] – session 28 – [session 29] – session 30
Day 10: [session 10 – session 24 - session 31] - session 32 - [session 33] - session 34
Day 11: [session 10 – session 24 – session 35] - session 36 - [session 37] – session 38
Day 12: [session 10 – session 24 – session 39]
But why the hurry? I do not advise this at all. It is far better to so it in 39 days, and use the other practice sessions to learn another 4 or 5 pieces. They will be learnt far more securely and at the end of 39 days, you can easily have 4 or 5 new pieces under your belt. In a year that means 50 – 60 pieces in your repertory (2 – 3 hours of uninterrupted performance). Keep it up, and in five years you could have 300 pieces on your repertory practising around one hour, one hour and a half everyday. The only secret is
consistency. Unfortunately consistency is the single most difficult thing in the whole universe. The whole universe will conspire against you so that you cannot keep the consistency. Observe it.

Best wishes,
Bernhard.