@Test
public void testGetInstanceSequence4() throws Exception {

    Date instance = getDate("2010-01-01 01:03 UTC");
    Date start = getDate("2010-01-01 01:01 UTC");
    Frequency frequency = Frequency.fromString("minutes(2)");
    Assert.assertEquals(2, EntityUtil.getInstanceSequence(start,
            frequency, tz, instance));
}