I don't usually save the progress steps, so it's hard to find =)
I do everything digitally. Sketch -> lineart -> base colour - > shadows -> details. The actual steps may vary a lot, sometimes I start with head and eye marking (first picture), sometimes with whatever the hell I want (second picture), it can be the eye, the hair or anything else
But I mostly have 2-4 sketches before actual line 
The time also vary, of course, from 1 hour to infinity and beyond, like a few weeks~