use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let t: usize = itr.next().unwrap().parse().unwrap();
    let mut out = Vec::new();
    for _ in 0..t {
        let n: usize = itr.next().unwrap().parse().unwrap();
        let a: Vec<usize> = (0..n)
            .map(|_| itr.next().unwrap().parse().unwrap())
            .collect();

        let mut map = std::collections::HashMap::new();
        for i in 0..n {
            let p = map.entry(a[i]).or_insert(0);
            *p += 1;
        }

        let mut l = 0;
        let mut r = 1 << 30;
        while r - l > 1 {
            let mid = (l + r) >> 1;
            if map.iter().fold(0, |acc, x| acc + std::cmp::min(mid, *x.1)) >= mid * 3 {
                l = mid;
            } else {
                r = mid;
            }
        }
        writeln!(out, "{}", l).ok();
    }
    stdout().write_all(&out).unwrap();
}