Suggestion for charts: Histogram

it would be useful to have a Histogram representation for charts.

For example, I am plotting a histogram of DNS response times for authoritative queries. From Dnstap I obtain a float value in milliseconds.

If I try to plot it as a scatter plot with dns_rtt as row, and, say, "count" as a metric, I see this:

Which, of course, is sadly useless.

I have found out that by rounding the milliseconds value to an integer I get a much more usable chart.

Seems that the line chart is better (scatter plot is a bit crazy for this, I admit)

But still if I use flat values for the round trip time:

It breaks badly.

## Why?

Histograms are a very useful chart. In my case I have mitigated the issue rounding the values to integer milliseconds and, being interested on observing a metric in the milliseconds (can go from < 10 to > 1000 in case of serious issues) it is enough. But in other cases this lack of a proper histogram can be a limitation.

If the number of events taken into account is large, a scatter chart with float numbers can give an enormous pounding to the web browser as well. :)

## Your Environment

* Graylog Version: Graylog 7.0.0beta3, relevant to 6.x and previous versions.
* OpenSearch Version:
* MongoDB Version:
* Operating System:
* Browser version: