1 : occurring twice a week
2 : occurring every two weeks

Maybe it’s just me, but there’s a bit of a difference there.  For more fun, bimonthly says it’s twice a month and every two months.  So technically, an article that comes out every two weeks is both biweekly and bymonthly while also not being bimonthly.

Credit to the Merriam-Webster Dictionary for our perpetually confused words for today.