update to accurate description of field (#2417)

Author: rbs333

content/commands/ft.info.md

@@ -79,7 +79,7 @@ is the name of the given index. You must first create the index using [`FT.CREAT
 | Statistic | Definition |
 |:---       |:---        |
 | `hash_indexing_failures` | The number of failures encountered during indexing. |
-| `total_indexing_time` | The total time taken for indexing in seconds. |
+| `total_indexing_time` | The cumulative wall-clock time spent indexing documents in ms. |
 | `indexing` | Indicates whether the index is currently being generated. |
 | `percent_indexed` | The percentage of the index that has been successfully generated (1 means 100%). |
 | `number_of_uses` | The number of times the index has been used. |