package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func main() {
	sc.Split(bufio.ScanWords)
	t := nextInt()

	for p := 0; p < t; p++ {
		n, c := nextInt(), 0
		m := make(map[int]int)
		for i := 0; i < n; i++ {
			m[nextInt()]++
		}

		for {
			kd := make([]int, 0, 3)
			for i := 0; i < 3; i++ {
				s, max := 0, 0
				for k, v := range m {
					found := false
					for _, v2 := range kd {
						if k == v2 {
							found = true
							break
						}
					}

					if v > max && !found {
						max, s = v, k
					}
				}
				if s == 0 {
					break
				}
				kd = append(kd, s)
				m[s]--
			}
			if len(kd) < 3 {
				break
			}
			c++
		}
		fmt.Println(c)
	}
}

func nextLine() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	i, _ := strconv.Atoi(nextLine())
	return i
}

func nextInt64() int64 {
	i, _ := strconv.ParseInt(nextLine(), 10, 64)
	return i
}

func comb(a []int, r int, fn func([]int)) {
	if r > len(a) || r < 1 {
		return
	}

	var f func([]int, int, int)
	f = func(ret []int, last, c int) {
		if c == 0 {
			fn(ret)
			return
		}

		c--
		for i, v := range a[last : len(a)-c] {
			ret[r-c-1] = v
			f(ret, i+last+1, c)
		}
	}

	ret := make([]int, r)
	f(ret, 0, r)
}