import java.io.IOException;
import java.util.Arrays;
import java.util.Comparator;
import java.util.InputMismatchException;
import java.util.TreeMap;

public class Main {
	void run() {
		MyScanner sc = new MyScanner();

		for (int T = sc.nextInt() - 1; 0 <= T; T--) {
			int n = sc.nextInt();
			TreeMap<Integer, Integer> map = new TreeMap<Integer, Integer>();
			int value = 0;
			Integer[] a = new Integer[n];
			Arrays.fill(a, 0);
			for (int i = 0; i < n; i++) {
				int key = sc.nextInt();
				if (!map.containsKey(key)) {
					map.put(key, value++);
				}
				key = map.get(key);
				a[key]++;
			}
			Comparator<Integer> cmp = new Comparator<Integer>() {
				@Override
				public int compare(Integer o1, Integer o2) {
					return o2 - o1;
				}
			};
			Arrays.sort(a, cmp);

			int count = 0;
			while (true) {
				if (3 <= a.length && a[2] != 0) {
					count++;
					a[0]--;
					a[1]--;
					a[2]--;
				} else {
					break;
				}
				Arrays.sort(a, cmp);
			}

			System.out.println(count);
		}
	}

	public static void main(String[] args) {
		new Main().run();
	}

	public void mapDebug(int[][] a) {
		System.out.println("--------map display---------");
		for (int i = 0; i < a.length; i++) {
			for (int j = 0; j < a[i].length; j++) {
				System.out.printf("%3d ", a[i][j]);
			}
			System.out.println();
		}
		System.out.println("----------------------------" + '\n');
	}

	class MyScanner {
		int read() {
			try {
				return System.in.read();
			} catch (IOException e) {
				throw new InputMismatchException();
			}
		}

		boolean isSpaceChar(int c) {
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}

		boolean isEndline(int c) {
			return c == '\n' || c == '\r' || c == -1;
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		int[] nextIntArray(int n) {
			int[] array = new int[n];
			for (int i = 0; i < n; i++)
				array[i] = nextInt();
			return array;
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		long[] nextLongArray(int n) {
			long[] array = new long[n];
			for (int i = 0; i < n; i++)
				array[i] = nextLong();
			return array;
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		double[] nextDoubleArray(int n) {
			double[] array = new double[n];
			for (int i = 0; i < n; i++)
				array[i] = nextDouble();
			return array;
		}

		String next() {
			int c = read();
			while (isSpaceChar(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do {
				res.appendCodePoint(c);
				c = read();
			} while (!isSpaceChar(c));
			return res.toString();
		}

		String[] nextStringArray(int n) {
			String[] array = new String[n];
			for (int i = 0; i < n; i++)
				array[i] = next();

			return array;
		}

		String nextLine() {
			int c = read();
			while (isEndline(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do {
				res.appendCodePoint(c);
				c = read();
			} while (!isEndline(c));
			return res.toString();
		}
	}
}