I have index with fields like deviceId, deviceName, osName etc. I need to get top N osNames with count. For this I prepare query like this:

var response = await this.esClient.SearchAsync<object>(s =>
                s.Index(Constants.DevicesIndexName)
                    .Size(0)
                    .Aggregations(a =>
                        a.Terms("top_os", t =>
                            t.Field("osName")
                                .Size(7))));

var aggregations = response.Aggregations.GetStringTerms("top_os");

var series = aggregations.Buckets.Select(value => new DataSeries { Name = value.Key.ToString(), Data = [(int)value.DocCount] }).ToList();

I am thinking that here can be a better or at least improved way to get this data.

Should I pass some concrete type into .SearchAsync<T> method that represent structure of index? Should I receive terms in other type?

Nuget package used: Elastic.Clients.Elasticsearch 8.12.0