@Test public void shouldFindNthMostRepeatedElement() {

  int[] numbers = { 1, 1, 2, 3, 4, 5, 2, 2, 2, 4, 4, 6, 7, 4, 9, 214, 4, 5, };
  int result = findNthMostRepeatedElement.find(numbers, 2);
  assertEquals(1, result);
}