I am sorry, I forgot the reason why someone would have to track the time it took to make a quilt. I guess I am like the gals who don't work on one at a time and that is the reason it is near impossible to tell when it is finished. To me, unless I am under the gun to finish something, I don't rush the process. After all this is my creativity time and therefore, relaxing fun. It would seem to me tracking my time would stifle all of that.
But, if asked, I'd simply say, "Hours and hours". Because I am not very fast at any of the tasks it takes to finish one. That isn't my goal or the purpose of why I quilt.