  <tr>
      <td>Months</td><td><code>vis-january</code>, <code>vis-february</code>, <code>vis-march</code>, <code>vis-april</code>, <code>vis-may</code>, <code>vis-june</code>, <code>vis-july</code>, <code>vis-august</code>, <code>vis-september</code>, <code>vis-october</code>, <code>vis-november</code>, <code>vis-december</code></td>
    </tr>
    <tr>
      <td>Years</td><td><code>vis-year2014</code>, <code>vis-year2015</code>, ...</td>
    </tr>
  </table>
  <p>
    Note: the 'week' scale is not include