7 string references to 'format_interval'

CronForm::buildForm in drupal/core/modules/system/lib/Drupal/system/Form/CronForm.php
Implements \Drupal\Core\Form\FormInterface::buildForm().
DefaultProcessor::settingsForm in drupal/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/processor/DefaultProcessor.php
Implements \Drupal\aggregator\Plugin\ProcessorInterface::settingsForm().
FeedFormController::form in drupal/core/modules/aggregator/lib/Drupal/aggregator/FeedFormController.php
Overrides Drupal\Core\Entity\EntityFormController::form().
OpmlFeedAdd::buildForm in drupal/core/modules/aggregator/lib/Drupal/aggregator/Form/OpmlFeedAdd.php
Form constructor.
PerformanceForm::buildForm in drupal/core/modules/system/lib/Drupal/system/Form/PerformanceForm.php
Implements \Drupal\Core\Form\FormInterface::buildForm().
Time::buildOptionsForm in drupal/core/modules/views/lib/Drupal/views/Plugin/views/cache/Time.php
Provide a form to edit options for this plugin.
UserOnlineBlock::blockForm in drupal/core/modules/user/lib/Drupal/user/Plugin/Block/UserOnlineBlock.php
Overrides \Drupal\block\BlockBase::blockForm().