I'm separated from the process by a few months now (the last episode aired in December, and I haven't started the next part yet) but if I recall correctly... somewhere in the 5-8 hour range, typically?
Sketching would be like .5-1 hour, Inking 1-3 hours, Flatting 1-2 hours, Shading & effects 1-2 hours, Lettering and speech bubbles .5 hours.
Granted my speed was a lot better when working in batches (as most people's seem to be) but for most of the run I was out of backlog and so to make my weekly uploads on time-ish I would just bust out 1 page per week each week... that sucked lmao. Not doing that next time. Here's a sample page towards the end:
Links:
Full Series:
Reupload of Season 1 that I'm doing to test out converting pages to vertical scroll: