publish_frequency_by_hour_date_histogram_script.sh

curl -X GET 'http://localhost:9200/articles/_search?search_type=count&pretty=true' -d \
'{
    "query" : {
        "match_all" : {}
    },
    "facets" : {
        "by_hour" : {
            "range" : {
                "key_script" : "doc[\"published_on\"].date.hourOfDay",
                "value_script" : "1",
                "ranges" : [
                    { "from" : 0, "to" : 1 },
                    { "from" : 1, "to" : 2 },
                    { "from" : 2, "to" : 3 },
                    { "from" : 3, "to" : 4 },
                    { "from" : 4, "to" : 5 },
                    { "from" : 5, "to" : 6 },
                    { "from" : 7, "to" : 8 },
                    { "from" : 8, "to" : 9 },
                    { "from" : 9, "to" : 10 },
                    { "from" : 10, "to" : 11 },
                    { "from" : 11, "to" : 12 },
                    { "from" : 12, "to" : 13 },
                    { "from" : 13, "to" : 14 },
                    { "from" : 14, "to" : 15 },
                    { "from" : 15, "to" : 16 },
                    { "from" : 16, "to" : 17 },
                    { "from" : 17, "to" : 18 },
                    { "from" : 18, "to" : 19 },
                    { "from" : 19, "to" : 20 },
                    { "from" : 20, "to" : 21 },
                    { "from" : 21, "to" : 22 },
                    { "from" : 22, "to" : 23 },
                    { "from" : 23 }
                ]
            }
        }
    }
}'