#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<to;x++)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
//-------------------------------------------------------

int N,T;

void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>T;
	while(T--) {
		cin>>N;
		map<int,int> M;
		FOR(i,N) cin>>x, M[x]++;
		vector<int> V;
		ITR(it,M) V.push_back(it->second);
		sort(V.begin(),V.end());
		
		int ret=0;
		int H=V.size();
		if(H>=3) {
			while(V[H-3]) {
				V[H-1]--;
				V[H-2]--;
				V[H-3]--;
				ret++;
				sort(V.begin(),V.end());
			}
		}
		cout<<ret<<endl;
		
	}
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false);
	FOR(i,argc-1) s+=argv[i+1],s+='\n';
	FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	solve(); return 0;
}