For the Five Boroughs campaign, a 'period' of training, as used in the rules, is defined as 2 parts of the night.

Additionally, we have this campaign has the following special requirement for the training of a Discipline:

Disciplines

Taste of Blood: A character must have partaken of the vitae of someone who has mastered at least seven different powers within the Discipline. This is often cited as the reason some Kindred call distinct powers "gifts of the blood".

This requirement is automatically considered satisfied for all bloodline disciplines. Note that the vitae of any character who qualifies as a trainer for the discipline automatically meets the criteria for the Taste of Blood.