By default we would save every two seconds (of course only if the content was changed in any way, the save is throttled for 2 seconds by default). 

Unfortunately it is not possible to adjust that value using the fluent server side api.

Hopefully, we can easily change the setting by inheriting the default xhtml descriptor and providing our own value.

[EditorDescriptorRegistration(TargetType = typeof(XhtmlString), 
                              EditorDescriptorBehavior = EditorDescriptorBehavior.OverrideDefault)]
public class CustomXhtmlStringEditorDescriptor : XhtmlStringEditorDescriptor
{
	public override void ModifyMetadata(ExtendedMetadata metadata, IEnumerable<Attribute> attributes)
	{
		base.ModifyMetadata(metadata, attributes);
		if (!metadata.EditorConfiguration.ContainsKey("dirtyCheckInterval"))
		{
			metadata.EditorConfiguration.Add("dirtyCheckInterval", 3000);
		}
	}

	public CustomXhtmlStringEditorDescriptor(ServiceAccessor<TinyMceConfiguration> tinyMceConfiguration) 
	           : base(tinyMceConfiguration)
	{
	}
}