I did some time-and-motion monitoring in terms of getting changes to a manuscript fit from Scrivener to Word and cleaned and ready for The Agent to use.
Fine-cleaning two scenes (~2.5k words). That means reading them aloud, copying the pieces to a word file, then reading that to ensure it’s clean: 75 minutes.
Compiling from Scrivener to Word and cleaning up the resulting mess, adding a TOC, etc.: 75 minutes.
2.5 hours for each revision change, assuming a total copy of manuscript from Scrivener to final.
Lesson learned: Get the frickin’ manuscript done and fully cleaned ONCE before moving it into Word. Agh. Double agh.