Use the following steps to optimize pinging for your WordPress posts:

1. Log in to Dashboard as an administrator.
2. Click the Discussion sub-menu item under the Settings menu item in the left menu to get a screen similar to the following:

3. Tick the Allow link notifications from other blogs (pingbacks and trackbacks) on new posts option in the Default post settings section to enable pingbacks.
4. Click the WordPress Ping Optimizer menu item in the Settings menu to get a screen similar to the following:

5. Keep the default set of URLs for the Separate multiple service URIs with line breaks: setting.
6. Tick the Enable pinging option.
7. Tick the Limit excessive pinging in short time option and set ping to 1 time within 5 minutes.
8. Click the Save Settings button to save the settings.

Now, your post pinging will be optimized for the configured time periods as well as for other settings, such as post status.