public function twiceMonthly($first = 1, $second = 16)
    {
        $days = $first.','.$second;

        return $this->spliceIntoPosition(1, 0)
            ->spliceIntoPosition(2, 0)
            ->spliceIntoPosition(3, $days);
    }
public function twiceMonthly($first = 1, $second = 16)
    {
        $days = $first.','.$second;

        return $this->spliceIntoPosition(1, 0)
            ->spliceIntoPosition(2, 0)
            ->spliceIntoPosition(3, $days);
    }
public function twiceMonthly ( $ first = 1 , $ second = 16 ) { $ days = $ first . ',' . $ second ; return $ this -> spliceIntoPosition ( 1 , 0 ) -> spliceIntoPosition ( 2 , 0 ) -> spliceIntoPosition ( 3 , $ days ) ; }
Schedule the event to run twice monthly.

@param  int  $first
@param  int  $second
@return $this
Schedule the event to run twice monthly .