Thank you so much Michael! It works great! Here’s the final code that’s working, in case someone else need it:
<?php require_once(ABSPATH . 'wp-content/plugins/contact-form-7-to-database-extension/CFDBFormIterator.php');
$exp = new CFDBFormIterator();
$exp->export('NAME OF THE FORM', array('show' => 'submit_time', 'trans' => 'CountField(submit_time)'));
$count = 0;
while ($row = $exp->nextRow()) {
$count = $row['submit_time'];
}
if ($count > 600 ): ?>
//Content to show if number of submissions are greater than 600.
<?php else : ?>
//Content to show if number of submissions are less than 600.
//For example, show the form <?php echo do_shortcode('[contact-form-7 id="112" title="NAME OF THE FORM"]'); ?>
<?php endif; ?>
Thank you again!
/Marcus