Dash 8 Ground School
The Ground School itself (excluding sims) takes approx. 8 weeks.
As little as 6, as much as 10.
The simulator, in a perfect world, takes another 3 weeks or so.
But due to the delays on the Q400 sim, if you are on this variant, expect to sit around at your base until they can find some slots in the sim for you. At the moment this is around an 8 week delay.
Line training should take around 6 weeks after doing your endo in the sim.
For the Q400 guys, it's not unrealistic for it to take 6 months from joining to check-to-line.
Sustaining Fleet (200/300) should be checked-to-line after around 4 months.