code: public static function perDay($days = 1, $date_format = "m-d")
      {
          $hits_per_day = [];
  
          for ($i = 1; $i <= $days; $i++) {
              $hits_count = self::interval(Carbon::now()->subDays($i), Carbon::now()->subDays($i - 1));
  
              $hits_per_day[Carbon::now()->subDays($i)->format($date_format)] = $hits_count;
          }
  
          return $hits_per_day;
      }
docs: Returns an associative array. The keys are the date and the values
  are the number of hits during that date. If no parameter is
  provided the method returns the hits for the last day.
  
  @param int $days
  @param string $date_format
  @return array