How do I create a chart with the x-axis as processing time for transactions and the y-axis as number of events?

Location Processing Time (minutes) ----------- --------------------------- Central 21.6 South East 27.4 How do I generate a report with my x-axis as 'Processing time' and y-axis as Number of events? With this report, I want to get the time taken by transactions. Any help is appreciated. Thanks in advance.