t = int(input())
for i in range(t):
    n = int(input())
    L = list(map(int,input().split()))
    Lunique = list(set(L))
    if len(Lunique)<=2:
        print(0)
        continue

    cnt = [L.count(lu) for lu in Lunique]
    cnt.sort(reverse=True)

    ans=0
    while 1:
        for i in range(3):
            if cnt[i]==0:
                break
            cnt[i]-=1
        else:
            cnt.sort(reverse=True)
            ans+=1
            continue
        break

    print(ans)