#include <bits/stdc++.h>
#define For(i, a, b) for(int i = a; i < b; i++)
#define rep(i, n) For(i, 0, n)
#define rFor(i, a, b) for(int i = a; i >= b; i--)
#define ALL(v) (v).begin(), (v).end()
#define rALL(v) (v).rbegin(), (v).rend()
using namespace std;

using lint = long long;
using ld = long double;

int INF = 2000000000;
lint LINF = 1000000000000000000;

int main() {
    int t;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;
        map<int, int> mp;
        rep(_, n) {
            int l;
            cin >> l;
            mp[l]++;
        }
        set<int> s;
        for (auto [fi, se] : mp) {
            if (!s.count(fi)) {
                s.insert(fi);
            }
        }
        int ans = 0;
        while ((int)s.size() >= 3) {
            auto it = s.begin();
            int a = *it;
            it = next(it);
            int b = *it;
            it = next(it);
            int c = *it;
            ans++;
            mp[a]--;
            if (mp[a] == 0) {
                s.erase(a);
            }
            mp[b]--;
            if (mp[b] == 0) {
                s.erase(b);
            }
            mp[c]--;
            if (mp[c] == 0) {
                s.erase(c);
            }
        }
        cout << ans << endl;
    }
}