Built-in Addons:

WP Heartbeat

WordPress uses Heartbeat API to perform background operations through AJAX calls executed as a ‘heartbeat’ on a predefined time, depending on the page. By default, you can’t adjust how heartbeat works. But, with this addon you can control frequecy between heartbeat for 3 important areas: post editing, admin and front end side.

WP Heartbeat Settings
WP Heartbeat Settings