Daniel, once John put me right on this, and from your further comments, I can see how it makes sense to work in stops rather than time based measurement.
I'm at a stage where I want my prints to be more than flat/ workprints, and I think one of the hardest parts is working out where to apply dodging/ burning and how to apply it.
Your thread here, which I also hope others will contribute to, is a definite aid to seeing how negatives are "worked up" into a final print.
Thanks
Tony