title: Elasticsearch Aggregation most common list of integers
body: <p>I am looking for elastic search aggregation + mapping
  that will return the most common <strong>list</strong> for a certain field.
  For example for docs:
  <code>{&quot;ToneCurvePV2012&quot;: [1,2,3]}</code>
  <code>{&quot;ToneCurvePV2012&quot;: [1,5,6]}</code>
  <code>{&quot;ToneCurvePV2012&quot;: [1,7,8]}</code>
  <code>{&quot;ToneCurvePV2012&quot;: [1,2,3]}</code></p>
  <p>I wish for the aggregation result:
  <strong>[1,2,3]</strong> (since it appears twice).</p>
  <p>so far any aggregation that i made would return: 1</p>