Yes, it’s very interesting.
It is very normal to say “how often do you get paid?”
Answer: “once a fortnight”. / “every fortnight”.
Meaning- (once) every 2 weeks.
Might come down to the fact Aussies shorten everything as much as possible when speaking.
I often have people tell me I don’t sound Australian etc, because they can understand me
But, I have lived with many people from different countries, and Irish parents, so speak with some kind of Irish accent, mixed with Australian, and now maybe Italian?
I have just been watching an Australian comedy called “please like me” - and I wondered where the main actor was from. I thought he looked familiar. Then I heard some more actors speaking, and some references to Brisbane, so I looked up the fellow.
He’s from Adelaide and thus the different accent.
Sorry for the digression @bkp9088 - I hope you got your answer amonst all this talk of fortnights, etc.