There are times I think Ansel Adams was an optimist.Ansel Adams once said that a dozen good frames per year was a reasonable goal for a good photographer.
I believe it was based on David Bailey who at the time was one of my favorite photographers.Take a look to the movie "Blow up" . David Hemmings acts as photographer in the late 60's.
He had some camera assistants who only changed the film rolls...
Thank you for inspiring