That does not sound like a lot, right? Well, it quickly adds up, however - after all, there's about 350 or so cords in the complete skirt. These cords are very hard twisted, and one way to make this type of cord is to use the twist-and-cross method that was also employed for making bast proto-fabrics, like the mat Ötzi had with him.
Twist-and-cross means you twist each of your elements in one direction, then cross it over the other in the opposite direction. This gives you very good control and enables you to make a very hard cord with lots of twist and countertwist. Accordingly, the ply angle can be very high. The downside is that it takes a rather long time...
You can see how I do the twist-and-cross on one cord of my skirt in this video:
I've come a bit further than when I filmed this, but there's still about one metre to go... with the cords. That is a lot of twisting left to do!