Thanks for your reply, I forgot to mention that in the program website it says it's a 1 year program of 3 semesters. I figured it's 1 calendar year which means 1 and a half academic year, which could mean more than only 1 year of pgwp, but I could be wrong.
If you complete the entire program within a calendar year (i.e. 12 months), that would be the length of your PGWP. If the three semesters were spread out over e.g. 18 months, then your PGWP would be 18 months.