Fixed wording

close yiisoft#10718

Author: drodata

docs/guide/caching-data.md

@@ -1,7 +1,7 @@
 Data Caching
 ============
 
-Data caching is about storing some PHP variable in cache and retrieving it later from cache.
+Data caching is about storing some PHP variables in cache and retrieving it later from cache.
 It is also the foundation for more advanced caching features, such as [query caching](#query-caching)
 and [page caching](caching-page.md).
 
@@ -283,7 +283,7 @@ You can flush the cache from the console by calling `yii cache/flush` as well.
  names separated with space)
  - `yii cache/flush-all`: flushes all cache components in the application
 
-> Info: Console application uses separate configuration file be default. Ensure, that you have the same caching
+> Info: Console application uses a separate configuration file by default. Ensure, that you have the same caching
 components in your web and console application configs to reach the proper effect.