I watched the three different Stringers work on dozens of frames over about six months. Then the Shop Owner, who was a friend, gave me a key and allowed me to string my own frame after hours.
My first job took about two hours. By the time I was stringing my fourth frame I had it down to about 35 minutes ... and I wasn't interested in being the fastest.
(I haven't strung my own frames for years, but I'd be comfortable doing so again, if needed.)
- KK