Here's another class demo for my beginning character design students. I started it on November 5 then did the 2 back views on December 2 and completed the pencil line early today on December 5. Sometimes it's not possible to do the entire work at once so I break it into sittings and eventually complete the drawing in class.
I'm sure you've heard it before from me that rotations are an essential aspect of professional character design as they are the bridge between the concept and production. Also they're excellent practice for developing solid draftsmanship skill and they're fun to do.