I don't think you can get any specific answers to this. It depends on milion things and half of them may be different on every workplace/state/journal/...
For example I wrote first draft of the paper in four days, because I was ordered to. Then there was a kind of change of mind.That was four years ago. It's still not submited yet.
For reviews of course it is different. There you create it by writing and not only by assembling results and adding some test to it. Writing reviews depends a lot on how good writer are you (I'm a terrible one).
Also one thing it to submit the forst version, the second is what may reviewers want to change/add/restructure etc. Sometimes they want you to make several new experiments, so there may be months before you can submit new version. (but this happen mostly in good journals only, for a high impact journal we need to calculate with about a year from submission to publication in printed journal)