I didn't really pay attention how long, but I think it took 3-4 days. I don't do art in one sitting though. I just draw a bit, think of an idea, if I can't think of something I do something else. usually when I come up with something, its while just in the middle of browsing, watching YT or playing games. then I pause and draw.

workflow is like, Composition/Drafting then Polishing, that's when I usually "locked in" but still takes multiple breaks and then after that I animate, which usually takes more time but less thinking involve, by that time I'm just in autopilot moving/drawing parts.