The length of a visit (in terms of time) is one of the most unsatisfactory web analytics statistics no matter what analytics product you use.

One obvious reason is that you can’t really correlate the length of time with actual visitor attention, even if you do have good numbers about how long the site was on the screen. The less obvious reason is that the numbers just aren’t very good to begin with. But if you really want to know how long people spent on a page for a single page visit, you might want to look at the following “pulse” code.