#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  ;
  long long t;
  cin >> t;
  while (t--) {
    long long n, x;
    cin >> n >> x;
    long long a[n];
    for (long long i = 0; i < n; i++) cin >> a[i];
    sort(a, a + n);
    long long count = 0, value = 0, prev = n;
    for (long long i = n - 1; i >= 0; i--) {
      value = a[i];
      if (value * (prev - i) >= x) {
        prev = i;
        count++;
      }
    }
    cout << count << "\n";
  }
  return 0;
}
