Modified the doc string of value_counts for DataFrame and series when sort arg is set to false (pandas-dev#52857)

Author: VomV

pandas/core/base.py

@@ -825,7 +825,7 @@ def value_counts(
             If True then the object returned will contain the relative
             frequencies of the unique values.
         sort : bool, default True
-            Sort by frequencies.
+            Sort by frequencies when True. Preserve the order of the data when False.
         ascending : bool, default False
             Sort in ascending order.
         bins : int, optional

pandas/core/frame.py

@@ -6964,7 +6964,7 @@ def value_counts(
         normalize : bool, default False
             Return proportions rather than frequencies.
         sort : bool, default True
-            Sort by frequencies.
+            Sort by frequencies when True. Sort by DataFrame column values when False.
         ascending : bool, default False
             Sort in ascending order.
         dropna : bool, default True