"label": {
                "show": true,
                "position": "top",
                "margin": 8
            }
        }
    ],
    "legend": [
        {
            "data": [
                "freq"
            ],
            "selected": {
                "freq": true
            },
            "show": true,
            "padding": 5,
            "itemGap": 10,
            "itemWidth": 25,
            "itemHeight": 14
        }
    ],
    "tooltip": {
        "show": true,
        "trigger": "item",
 