#include "bits/stdc++.h"
using namespace std;

void calc() {
	int N;
	cin >> N;
	vector<int> L(N);
	long long sum = 0;
	map<int, int> m;
	for (int i = 0; i < N; i++)
	{
		cin >> L[i];
		sum += L[i];
		m[L[i]]++;
	}
	
	priority_queue<int> pq;

	for (auto i : m){
		pq.push(i.second);
	}

	if (m.size() < 3){
		cout << 0 << endl;
		return;
	}

	int ans = 0;
	while (true){
		int a = pq.top(); pq.pop();
		int b = pq.top(); pq.pop();
		int c = pq.top(); pq.pop();
		if (c <= 0){
			cout << ans << endl;
			return;
		}
		ans++;
		pq.push(a - 1);
		pq.push(b - 1);
		pq.push(c - 1);
	}
}

int main(){
	int T;
	cin >> T;
	for (int i = 0; i < T; i++)
	{
		calc();
	}
}