src/Russian/TimeSpeller.php
public static function spellUnit($count, $unit)
    {
        if (!isset(static::$units[$unit])) {
            throw new InvalidArgumentException('Unknown time unit: '.$unit);
        }

        return pluralize($count, static::$units[$unit]);
    }
public static function spellUnit($count, $unit)
    {
        if (!isset(static::$units[$unit])) {
            throw new InvalidArgumentException('Unknown time unit: '.$unit);
        }

        return pluralize($count, static::$units[$unit]);
    }
@param $count
@param $unit

@return string
@throws \Exception