Thank you and very good question. Usually when I knit design number 1 I don't measure the time because I only knit to get the piece right. Once I have the pattern I just measure the time.
In this case, as it's a unique design (I think) I didn't measure the time, although I estimate about 30 hours between knitting and unknitting. Good vibes!.
30 hours, maybe just for the fun of knitting, since I won't want toy stressing yourself.