can I show for each posts the insert date like as '1 hours ago', '2 days ago', '2 weeks ago', etc..
Thanks in advance!
Put this in the appropriate template.
<?php echo human_time_diff( get_the_time('U'), current_time('timestamp') ) . ' ago'; ?>
Normally the php file you should look for would be entry-meta.php
Remember to use a child theme..