Till now, google search history used to show the graph showing how many searches you performed every hour for particular time period. So, till now, we were able to see only the total number of queries made every hour.. Now, google has got new small feature that shows the top 3 details of that hour's search!
Following is the snapshot to understand it better..
So, when you click on the graph on your search history page, you will see small popup with details.. Good step forward..
Stay tuned.. 