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//opt/redis-8/src/commands/latency-history.json
 {
    "HISTORY": {
        "summary": "Returns timestamp-latency samples for an event.",
        "complexity": "O(1)",
        "group": "server",
        "since": "2.8.13",
        "arity": 3,
        "container": "LATENCY",
        "function": "latencyCommand",
        "command_flags": [
            "ADMIN",
            "NOSCRIPT",
            "LOADING",
            "STALE"
        ],
        "command_tips": [
            "NONDETERMINISTIC_OUTPUT",
            "REQUEST_POLICY:ALL_NODES",
            "RESPONSE_POLICY:SPECIAL"
        ],
        "reply_schema": {
            "type": "array",
            "description": "An array where each element is a two elements array representing the timestamp and the latency of the event.",
            "items": {
                "type": "array",
                "minItems": 2,
                "maxItems": 2,
                "items": [
                    {
                        "description": "timestamp of the event",
                        "type": "integer",
                        "minimum": 0
                    },
                    {
                        "description": "latency of the event",
                        "type": "integer",
                        "minimum": 0
                    }
                ]
            }
        },
        "arguments": [
            {
                "name": "event",
                "type": "string"
            }
        ]
    }
}