[Maken]

In other answer they link to the original specification [1], and it says that names must start with a letter, so anything preceded by "_" cannot be a frame name.

[1] https://www.w3.org/TR/WD-frames-970331#frame

[stickfigure]

This one sentence is better than the original article.

[hbn]

That sentence wouldn't have made sense to me before I read the original article.

I got into web dev after HTML5, I've never heard of <frameset>

[n_plus_1_acc]

Thanks