private function _getRecurringFrequency(Payment_Invoice_Subscription $recurrenceInfo)
{
switch ($recurrenceInfo->getCycle()) {
case 'D':
$t = 'days';
break;
case 'W':
$t = 'week';
break;
case 'M':
$t = 'month';
break;
case 'Y':
$t = 'year';
break;
default:
$t = 'month';
break;
}
return $recurrenceInfo->getCycle() . ' ' . $t;
}
