Worked out one method (added to functions.php):
// Override LiteSpeed Doing a Million Things Every Minute
add_filter(‘cron_schedules’, ‘filter_cron_schedules’);
function filter_cron_schedules($schedules) {
$schedules[‘litespeed_filter’] = array(
‘interval’ => 900, // seconds
‘display’ => __(‘LiteSpeed 900 Instead of 60’)
);
return $schedules;
}