This reminds me of the odd property that bends in a river are separated by about 6 times the width of a river. And this seems to happen pretty often in nature.

https://en.wikipedia.org/wiki/Alluvial_river#Meander_wavelen...

Way back in school they'd issue this in the form of a question to undergrads just to see how they'd model it / try and answer. I'm not sure if it's understood why the number is '6'