I'm not sure there is a 'final destination'. Scores rise and fall frequently-- a lot of it has to do with what people are searching for. If you have previously written about a subject that seems ordinary, and that subject suddenly happens to figure in a current hot news story, searches will make your views and your score rise.
Seasonal subjects like holidays tend to rise and fall. Also-- you can always go in to an old hub to add content, revise, re-format, or otherwise change it, which can also affect your score.
It's always changing. There is no final score.
Can be a week or so, or can be months. Generally will take a few days to level out and then settle, however, if it is refined and the keywords honed in on a good target keyword group, it could spike again and go even higher.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.