icingaweb2/modules/monitoring/application/views/scripts/show/components/checkstatistics.phtml

<?= $this->expandable(
  $this->translate('Check statistics'),
'<table style="width:100%">
    <thead>
    </thead>
    <tbody>
        <tr>
   <td style="width: 25em">' . $this->translate('Last check') . '</td>
   <td>' . $this->format()->timeSince($object->last_check) . '</td>
  </tr>
  <tr>
   <td>' . $this->translate('Next check') . '</td>
   <td class="icinga-uiwidget-countdown" countdown-end="' . $object->next_check . '">'
      . $this->format()->timeUntil($object->next_check)
      . '</td>
  </tr>
  <tr>
    <td>' . $this->translate('Check execution time') . '</td>
    <td>' . $object->execution_time . '</td>
  </tr>
  <tr>
   <td>' . $this->translate('Check latency') . '</td>
   <td>' . $object->latency . '</td>
  </tr>
 </tbody>
</table>
',
array('collapsed' => false)
);