Title: Health manpower. II. Physician time expended in shaving.
Author: Riley HD Jr
Journal: South Med J 1989 Jul;82(7):932-3
PMID: 2749368, UI: 89317666
This letter estimates 6 minutes a day for shaving, 45 minutes a week, 40 hours a year, and about 100 days over the course of a lifetime. Yikes!