That's every other year, which is quite different from 2+yearly, which is exactly the point the gp was making.

"Four times every two years" isn't exactly the same as "twice every year", but also reflects a similar, "not that unusual" answer.

Although I didn't claim "twice every year" in my top-level comment either. It's just a very basic statement of the base rate.

Make it eight-times every four years or sixteen-times every eight years. I don't think it really changes the point.

[delayed]

I think "every other year" is 100% of a piece with grandparent's point, which is that this is "newsworthy but not notable".

Markets move. Sometimes they move more than normal. This is one of those times.

Will it keep moving? Will it crash? Maybe! But what it has done right now is not that.

Every other year is much less frequent than twice a year?

Multiple times every other year.

'Biannual' finally found it's perfect use case.

yes almost every year this happens