The ‘Browsing by Site’ displays a timeline view of the page visits.
By scrolling down, you’ll see a display of each visited site accompanied by its own timeline: Total time spent on the site, percentage of active time, and that percentage against the day’s total.
You can also search for a specific site to see if it was visited. In the ‘site’ search you can also look for any tag you might have created, for example ‘Science’, and find all the sites you marked with that tag. You can also select any day in the last few months (the exact length of history depends on the storage available).
Finally, moving the mouse over the timeline shows you exactly the site visited and time under that part of the timeline.