No matter which job you select, the answer to your question will only be answered when you arrive at your Phase 2 establishment - and maybe not even then. The aim is to keep the gap as small as possible, but it could be a number of weeks.
Tell us your proposed trade and someone might be able to better advise you!
Knowing the system as I do and the fact that no plan ever survives contact with the enemy (especially my plans for some strange reason), I assumed that if you knew the dates of completion of Phase 1 and the start of Phase 2, then you were close to them. If you haven't even started basic, take my advice and think in terms of those dates being flexible guidelines!