IIRC the Federal Parliament sitting week ends at 5pm of a Thursday, so expect the poor muppets to be on the move on a Friday, if not late on a Thursday. Also, Monday sessions doesn't start until 10am, so some may be able to saunter in on a Monday morning.

Then takes off the pairs for those who are busy on tax payer funded overseas junkets...they won't need to travel in and out of CBR...

But then...add the partners (you know, the partners who are defined such so taxpayers pay for their free travel, but not partners for the purposes of disclosure in the register of pecuniary interests...)

...oh, and take off the ones who stay in Canberra on taxpayer funded expenses because they are conducting affairs with staffers...

...and if the mad monk is on the flight get your order in first in case he scoffs the lot (the one notion genuflector famously spending $7,340 on grog in 2 months)...