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

//#define int long long

typedef pair<int,int>pint;
typedef vector<int>vint;
typedef vector<pint>vpint;
#define endl '\n'
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define all(v) (v).begin(),(v).end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define reps(i,f,n) for(int i=(f);i<(n);i++)
#define each(it,v) for(__typeof((v).begin()) it=(v).begin();it!=(v).end();it++)
template<class T,class U>void chmin(T &t,U f){if(t>f)t=f;}
template<class T,class U>void chmax(T &t,U f){if(t<f)t=f;}

void solve(){
    int N;cin>>N;
    map<int,int>M;
    rep(i,N){
        int l;cin>>l;M[l]++;
    }

    priority_queue<int>que;
    each(it,M)que.push(it->second);
    int ans=0;
    while(que.size()>=3){
        int tmp[3];
        rep(i,3){
            tmp[i]=que.top();que.pop();
            tmp[i]--;
        }
        ans++;
        rep(i,3)if(tmp[i])que.push(tmp[i]);
    }
    cout<<ans<<endl;
}

int main(){
    cin.tie();
    ios_base::sync_with_stdio(0);

    int T;cin>>T;
    while(T--)solve();
}