si una variable esta repetida mas de 2 veces, agruparla

var x = [1, 1, 1];

function count(arr: Array<number>) {
  const obj = {};
  arr.forEach((num) => {
    if (obj[num]) {
      obj[num] = obj[num] + 1;
    } else {
      obj[num] = 1;
    }
  });

  const res = [];
  for (let prop in obj) {
    if (obj[prop] > 2) {
      res.push(prop);
    }
  }

  return res;
}

console.log(count(x));