Unique count of edges

Users Dgraph
3

Getting closer: This query

{
  q(func:type("Office"))  {
    officename: Office.bezeichnung
		Office.jobs @groupby(emp: Job.employees) 
  }
}

returns (among others):

{
  "data": {
    "q": [
      {
        "officename": "My Company",
        "Office.jobs": [
          {
            "@groupby": [
              {
                "emp": "0x1b"
              },
              {
                "emp": "0x1c"
              },
              {
                "emp": "0x18"
              },
              {
                "emp": "0x1d"
              }
            ]
          }
        ]
      },

Now what I want to get is the count of the @groupby

Maxing out to get only the office with the highest count on this groupby