Solve mongo query error

Hello i have a mongo db db name: Quicklook_db Collection name: quicklook_analyticsDesign Total Documents in collection: 2,00,000 + Sample json attached. From all the documents i want to find the most used 10 values in this attribute: $[login to view URL] I tried this code: $analytics = DB::connection('mongodb')->collection($this->designViewed)->raw(function($views) use ($dateto, $datefrom) { return $views->aggregate(array( array('$group' => array('_id' => ['store_id' => '$[login to view URL]'], 'total' => array('$push' => '$[login to view URL]'))), ), ['allowDiskUse' => true]); }); //suspect $analytics_arr = []; foreach ($analytics as $a) { $analytics_arr[$a->_id->store_id] = get_tiles_from_plane_union($a->total); unset($a); } $new_analytics_arr = []; foreach ($analytics_arr as $key => $pch) { if (empty($new_analytics_arr[$entities_arr[$key]['name']])) { $new_analytics_arr[$entities_arr[$key]['name']] = $pch; } else { $new_analytics_arr[$entities_arr[$key]['name']] = custom_array_merge($new_analytics_arr[$entities_arr[$key]['name']], $pch); } } $analytics_arr = $new_analytics_arr; dd($analytics_arr); But gives document size error 14 MB exceeded.