#include <bits/stdc++.h>
#define INF INT_MAX / 2
#define MOD 1000000007

using namespace std;

typedef pair<int,int> PII;
typedef long long ll;

int main(void) {
	int t;
	cin >> t;
	for(int ii=0;ii<t;ii++){
		int n;
		cin >> n;
		vector<int> l(n),cnt(n);
		map<int,int> count;

		for(int i=0;i<n;i++){
			cin >> l[i];
			count[l[i]]++;
		}

		auto it = count.begin();int m=0;
		for(;it!=count.end();it++)
			cnt[m++] = it->second;

		sort(cnt.begin(),cnt.end(),greater<int>());
		int ans = 0;

		while(cnt[0] != 0){
			int kadomatuCount = 0;
			for(int i=0;i<n;i++){
				if(cnt[i]>0){
					kadomatuCount++;
					cnt[i]--;
				}
				if(kadomatuCount==3){
					kadomatuCount = 0;
					ans++;
					break;
				}
			}
			sort(cnt.begin(),cnt.end(),greater<int>());
		}

		cout << ans << endl;
	}
}