Here in Portugal, almost everyone I know is paid monthly. Even the person who comes to my house weekly to clean asks to be paid once a month.
The only people I can think of who have a non-monthly regular pay schedule (not paid per job like freelancers) are door-to-door salespeople and mail ads deliverers.
From the Bureau link I posted above: "Biweekly is the most common length of pay period, with 36.5 percent of U.S. private businesses paying their employees every 2 weeks."
It seems the difference between biweekly (using this definition) and bimonthly is that occasionally you might get paid three times in a month, since the weeks don't align with the months.
I've been paid twice monthly, and monthly. I also know of people being paid weekly.