I too seldom work on just one project so I don't keep track since it seems like work to do that. Also, my dogs interrupt me so much when I am in my studio (which is not attached to the house) that I would have to account for that. And one more thing, since this is a hobby for me, I don't need or care to know how long it took me to make a quilt because I might not ever make another quilt! So my "usual answer" is I don't know how long it took.