Set custom widget cache expiration (TTL) time in Widget Output Cache plugin.

widget-cache-ttl.php

<?php

add_filter( 'widget_output_cache_ttl', 'widget_cache_custom_ttl', 10, 2 );

function widget_cache_custom_ttl( $ttl, $widget_args ) {
	
	// Set custom expiration time in seconds for each widget
	$map_ttl = array(
		'your_widget_id' => 3600,
		'another_widget_id' => 87700
	);

	$widget_id = $widget_args['widget_id'];

	if ( isset( $map_ttl[ $widget_id ] ) )
		return $map_ttl[ $widget_id ];

	return $ttl;

}