6 string references to 'format_interval' in Drupal 4

aggregator_form_feed in modules/aggregator.module

Generate a form to add/edit feed sources.

aggregator_settings in modules/aggregator.module

Implementation of hook_settings().

poll_form in modules/poll.module

Implementation of hook_form().

statistics_settings in modules/statistics.module

Implementation of hook_settings().

system_view_general in modules/system.module

user_block in modules/user.module

Implementation of hook_block().