Transaction per second, agg last 15 minutes

[Elad_Ben-aderet]

I have the "action" field, I want to query last 15 minutes
and get the avg 'transactions' for every action type every (interval) seconds.

I made this but it gives me just the last minute result

 body: {
   size: 0,
   query: {
     bool: {
       must: [
         {
           range: {
             '@timestamp': {
               gte: from,
               lt: to,
             }
           }
         }
       ]
     }
   },
  aggs:{
    {
      agg1: {
        date_histogram: {
          field: '@timestamp',
          interval: '5s',
          aggs:{
             sub_agg1: {
               terms: {
                 field: "action",
                 aggs: {
                   stats_aggregation: {
                       stats: {
                         field: "avg"
                        }
                     }
                 }
              },
            }
          }
        }
     }
    }
  }
 }