Histogram view of event value distribution

GA does not currently support reporting of individual value of event values. You do have two choices:

1. If you only want the distribution then use user timings. They conveniently go with your use case of tracking interaction timing. Don't forget to set the sample rate parameter or only 1% will be collected, unless you have already set _setSiteSpeedSampleRate.

2. Refactor your event so the timing value is a string of the event's action or label parameter. That way you can then use the API or export into a spreadsheet to generate a distribution. The benefit of this over the user timing is that you will have access to each individual unique value.

I know this is an old question but I was looking for something similar and my solution was to use a hit-level custom dimension to collect the numeric value. This allows you to assign a value to each and every individual event in the same way that category, action, and label are assigned.

If you do the bucketing upon collection, you can view your histogram within the reporting interface by changing from the "Data" view to the "Performance" view (horizontal bar charts). This can also be pulled from the reporting API.