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

int main(){
    int t,n,in;
    cin >> t;
    for(int i=0;i<t;i++){
        map<int,int> mp;
        vector<int> v;
        cin >> n;
        for(int j=0;j<n;j++) cin>>in,mp[in]++;
        for(auto iter=mp.begin();iter!=mp.end();iter++) v.push_back(iter->second);
        sort(v.begin(),v.end(),greater<int>());
        int cnt=0;
        if(v.size()<3) v.push_back(0),v.push_back(0);
        while(v[2]!=0){
            cnt++;
            v[0]--;
            v[1]--;
            v[2]--;
            sort(v.begin(),v.end(),greater<int>());
        }
        cout << cnt << endl;
    }

    return 0;
}