Finding documents that have a specific number of values

Elastic Stack Elasticsearch
1

Let's say I have a mapping like this where there is a nested field within another nested field:

"myIndex": {
    "properties": {
        "id": {
            "type": "keyword"
        },
        "stuff": {
            "type": "nested",
            "properties": {
                "pairs": {
                    "type": "nested",
                    "properties": {
                        "key": {
                            "type": "keyword"
                        },
                        "value": {
                             "type": "text"
                        }
                  }
            }
        }
    }
}

Is there a way to select documents that have a specific number of values in the pairs nested field above? So with this data that has 2 documents:

{
    "id": "5",
    "stuff": [
        {
            "pairs": [
                {
                    "key": "key1",
                    "value": "someValue"
                }
                {
                    "key": "key2",
                    "value": "someOtherValue"
                }                ]
        }
    ]
},
{
    "id": "6",
    "stuff": [
        {
            "pairs": [
                {
                    "key": "key1",
                    "value": "someValue"
                },
                {
                    "key": "key2",
                    "value": "someValue"
                }
            ]
        }
    ]
}

I want a query that returns documents that has the value "someValue" in exactly 2 items within pairs? Or that has at least 2? In this case document id "6" would only be returned.

2

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