For envoy it's depends when you start training. If you start before the 15th of a month it counts for that month accrual. If you start, for example, on January 1 you will acrrue 12 days off for the next year. If you start in January 16, then you only will get 11 days off for the next year.

Then it's 2 full weeks until yr 7, which you will get 3 weeks. If you get to flow before that, you will never see a 3rd week of vacation. I think 4 weeks is on yr 15, not sure about it.