Hits shows the number of times that file has been displayed as a search result.

In the Uploads column, number on the left shows completed uploads & number on the right shows attemped uploads. For example if you saw 6/10, it would mean 6 successful uploads out of 10 attempts. So you can see the files that have been uploaded most during the LW session by checking that uploads column.

You can also look at your uploads via LW's Monitor tab (between the Search & Connections tabs).
In LW tools > options > uploads, untick 'Automatically Clear Completed Uploads' > Apply > ok. Now you'll be able to see all uploads per session by clicking on that Monitor tab.