United States. I've had every payment system from once a month (while working at a Unviersity), to the 1st and 15th of every month (small company in Austin), to every 2 weeks (Much bigger company in Wisconsin).

The US. My currently employer pays this way. Many employers do as well

My experience in the US is that I have been paid bi-weekly far more often than monthly. (I can only recall one position that was paid monthly.)