@mayel It isn't that that's the issue, it's how to track the creative work. Sometimes no amount of staring at the page* helps but I'll go for a walk and when I come back I know what to write. Sometimes I'm sitting on the Tube picking at things in my head. It's hard to estimate that time.
*Yes, I still use actual pencil and paper for first drafts, and often for second drafts too. I'm old school like that.