Admittedly, I only have my own anecdotal evidence among my own experiences, friends, and family, but I can't think of anyone I've had the salary conversation with that mentioned getting paid other than monthly and would be curious to see what the actual breakdown is in the US.
Edit: This [1] article states that 59% of the US workforce is hourly, so it's accurate to say that bi-weekly is the most common frequency among all jobs in the US, but I can't find any resources that focus on the breakdown specifically among salaried workers.
[1] https://www.cbsnews.com/news/most-americans-are-hourly-worke...
So the data suggests that being paid every two weeks is somewhat more common than monthly. (And, for larger businesses, biweekly is overwhelmingly the norm.)
[1] https://www.bls.gov/opub/btn/volume-3/how-frequently-do-priv...
> In March 2013, 94.8 percent of private businesses were single-pay-period businesses
meaning that most companies pay all workers on the same schedule. Therefore, if a company has any hourly workers that get paid more frequently than monthly, everyone salaried in the company is going to get put in the same pay schedule as well. All the orgs I've worked at either paid monthly uniformly or were part of that rare 5.2% that had different pay schedules, so I admit that my experience is an outlier here.
