$ curl 'http://127.0.0.1:9200/catalog_links/catalog_link/_search?pretty&search_type=count' -d '{"query":{"match_all":{}},"facets":{"tags":{"terms":{"field":"tags"}}}}'                    
{
  "took" : 0,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "failed" : 0
  },
  "hits" : {
    "total" : 5,
    "max_score" : 0.0,
    "hits" : [ ]
  },
  "facets" : {
    "tags" : {
      "_type" : "terms",
      "missing" : 0,
      "total" : 17,
      "other" : 5,
      "terms" : [ {
        "term" : "tag1",
        "count" : 2
      }, {
        "term" : "else",
        "count" : 2
      }, {
        "term" : "thingy",
        "count" : 1
      }, {
        "term" : "thing",
        "count" : 1
      }, {
        "term" : "tag4",
        "count" : 1
      }, {
        "term" : "tag34",
        "count" : 1
      }, {
        "term" : "tag2",
        "count" : 1
      }, {
        "term" : "tag",
        "count" : 1
      }, {
        "term" : "something",
        "count" : 1
      }, {
        "term" : "some",
        "count" : 1
      } ]
    }
  }
}

$ curl 'http://127.0.0.1:9200/catalog_links/catalog_link/_search?pretty&search_type=count' -d '{"query":{"match_all":{}},"aggregations":{"tags":{"terms":{"field":"tags"}}}}'
{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "failed" : 0
  },
  "hits" : {
    "total" : 5,
    "max_score" : 0.0,
    "hits" : [ ]
  },
  "aggregations" : {
    "tags" : {
      "buckets" : [ {
        "key" : "else",
        "doc_count" : 2
      }, {
        "key" : "tag1",
        "doc_count" : 2
      }, {
        "key" : "4",
        "doc_count" : 1
      }, {
        "key" : "5",
        "doc_count" : 1
      }, {
        "key" : "6",
        "doc_count" : 1
      }, {
        "key" : "long",
        "doc_count" : 1
      }, {
        "key" : "name",
        "doc_count" : 1
      }, {
        "key" : "some",
        "doc_count" : 1
      }, {
        "key" : "something",
        "doc_count" : 1
      }, {
        "key" : "tag",
        "doc_count" : 1
      } ]
    }
  }
}