I would say somewhere between 4-5.5 years (due to huge animes like Naruto and One Piece).
Well, I watched 315 episodes of One Piece in legit 14 days /lolz/ That of course, includes me studying and taking a break etc :P Well, I guess it'll take me personally about 20 or so years to watch 2000 anime titles... I've only seen and completed about 170 titles altogether in a span of 2 years xD.
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.