Can you explain please where you see time spent?
Any how if you look at a service , also custom one as the follows, you can go and "create analysis view" under Multidimensional analysis section
And here you can also chart the response time by percentiles
There is not a way to pin a list of individual request response times to a tile on a dashboard. If you make all of the requests you care about key requests, you can make a custom chart using the 'key requests' response time metric and then filtering down to the service tag you care about. Otherwise, your best bet is to create a Multidimensional Analysis View, and then create a hyperlink to it on your dashboard with the markdown tile.