194     protected $interval = 1;  variable in Sabre\\VObject\\Recur\\RRuleIterator
325         $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' hours');
337             $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' days');
357 …              $this->currentDate = $this->currentDate->modify('+' . $this->interval - 1 . ' days');
363                 $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' days');
392             $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' weeks');
423 …             $this->currentDate = $this->currentDate->modify('+' . $this->interval - 1 . ' weeks');
450                 $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' months');
456                     $tempDate = $tempDate->modify('+ ' . ($this->interval * $increase) . ' months');
486             $this->currentDate = $this->currentDate->modify('+ ' . $this->interval . ' months');
531                     $nextDate = $nextDate->modify('+ ' . ($this->interval * $counter) . ' years');
573                     $currentYear += $this->interval;
613                     $currentYear += $this->interval;
618             $this->currentDate = $this->currentDate->modify('+' . $this->interval . ' years');
657                         $currentYear += $this->interval;
686                     $currentYear += $this->interval;