I’ve been asked that a couple of times. So, here’s a breakdown(times approximate):

Rough Draft:
1.5 hours per chapter

1st Rewrite:
30 minutes per chapter

2nd Rewrite:
15 minutes per chapter

Final Edit:15 minutes per chapter depending on how much needs fixed…lol

2 Hours Final Formatting Paperback

1 Hour Final Formatting Kindle

1 Hour uploading and cover editing 
Sha’al is going to be around 50 chapters.

Best case scenario for Sha’al:
130 hours spent writing, fixing, and fixing some more. 

That’s just over 3 forty hour work weeks

Or

43 minutes a day, 7 days a week, for 6 months.

Phew.