I was actually in the header code when I put those strings in, and while it may not have been the best way to do it, it does appear to have worked. I just searched for "documentation" and it found 45 instances. Turns out that the forum has that word in a description at the top of the page. There are 32 pages to the main section, and it found every one as well as 13 other places where that word is used.
I did some other searching and it seems to be finding those things as well. So I think it is ok.
As for how long it takes, it is usually 2 hours and 2 minutes these days, although it is taking a bit more as time goes on since the forum and the documentation part of the website are growing. Each piece is about 1.7 Gb when I back them up, and growing.