#include <bits/stdc++.h>
#define REP(i,n,N) for(int i=(n);i<(int) N;i++)
#define p(s) cout<<(s)<<endl
typedef long long ll;
using namespace std;

int main(){
	int T;
	cin >> T;
	REP(i,0,T){
		int N;
		cin >> N;
		vector<int> L(N);
		ll sum = 0;
		map<int, int> m;
		REP(i,0,N){
			cin >> L[i];
			sum += L[i];
			m[L[i]]++;
		}

		priority_queue<int> pq;

		for (auto i : m){
			pq.push(i.second);
		}
		int ans = 0;
		if (m.size() >= 3){
			while (1){
				int a = pq.top(); pq.pop();
				int b = pq.top(); pq.pop();
				int c = pq.top(); pq.pop();
				if (c <= 0)	break;
				ans++;
				pq.push(a - 1);
				pq.push(b - 1);
				pq.push(c - 1);
			}
		}
		p(ans);
	}
}