How to get the summation of inner_hits hits total value

Cannot figure out the syntax for aggregations per the doc for this. Would think this type of request is very common...

{
  "bible-book": {
    "mappings": {
      "properties": {
        "book": {
          "type": "text"
        },
        "chapters": {
          "type": "nested",
          "properties": {
            "chapter": {
              "type": "integer"
            },
            "verses": {
              "type": "nested",
              "properties": {
                "text": {
                  "type": "text",
                  "analyzer": "english"
                },
                "verse": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    }
  }
}
POST bible-book/_search
{  
  "_source": false,
  "query": {
    "nested": {
      "path": "chapters.verses",
      "query": {
        "match": {
          "chapters.verses.text": "consolation"
        }
      },
      "inner_hits": {}
    }
  }
}
 "hits": {
    "total": {
      "value": 11,
      "relation": "eq"
    },
    "max_score": 9.562649,
    "hits": [
      {
        "_index": "bible-book",
        "_id": "18",
        "_score": 9.562649,
        "inner_hits": {
          "chapters.verses": {
            "hits": {
              "total": {
                "value": 2,   <==== want the summation of this for inner_hits
                "relation": "eq"
              },
              "max_score": 9.7188