Thanks, milady
I know it's not really
relevant, and fortunately Oda doesn't have to rely on plot-devices that consist in referencing stuff that happened in the past, but I figured it could be interesting to know those numbers. Of course, it's not as if time holds any importance to Luffy - or the others, really - but still. For example, I liked that one bit where Franky, Robin and Chopper come to learn about Laboon; it's a normal moment (although it makes me teary-eyed every time), but it doesn't make the rest of the crew look "inadequate" for not being there at the time.
I guess in the end we're not given a very precise timeline because what matters is the present, the now, and how really strong the SHs bond is.
If I ever decide to re-read the manga from the start I'll be sure to pay attention to some of those things, maybe count all the instances they're shown sleeping x).