diff --git a/pep-0454.txt b/pep-0454.txt
index 4f3ce68a9..cac0108ce 100644
--- a/pep-0454.txt
+++ b/pep-0454.txt
@@ -344,13 +344,10 @@ Snapshot
     See also ``dump()``.
 
 
-``group_by(key_type: str, cumulative: bool=False)`` method:
+``statistics(key_type: str, cumulative: bool=False, compare_to=None)`` method:
 
-    Get statistics as a dictionary, grouped by *key_type*. Return a
-    dictionary ``{key: statistic}`` where the key type depends on
-    *key_type* and *statistic* is a ``Statistic`` instance.
-
-    Available key types:
+    Get statistics as a sorted list of ``Statistic`` instances, grouped
+    by *key_type*:
 
     =====================  ========================  ================================================
     key_type               description               type
@@ -362,20 +359,9 @@ Snapshot
 
     If *cumulative* is ``True``, cumulate size and count of memory
     blocks of all frames of the traceback of a trace, not only the most
-    recent frame.
-
-    The cumulative mode can only be used with key types ``'filename'``
-    and ``'lineno'`` with tracebacks with at least 2 frames (see
-    ``traceback_limit``).
-
-
-``statistics(key_type: str, cumulative: bool=False, compare_to=None)`` method:
-
-    Get statistics as a sorted list of ``Statistic`` instances, grouped
-    by *key_type*.
-
-    See the ``group_by()`` method for *key_type* and *cumulative*
-    parameters.
+    recent frame. The cumulative mode can only be used with key types
+    ``'filename'`` and ``'lineno'`` with ``traceback_limit`` greater
+    than ``1``.
 
     If *compare_to* is set to a previous ``Snapshot`` instance, compute
     the differences betwen the two snapshots. Otherwise,
@@ -421,8 +407,7 @@ Statistic
 ``key`` attribute:
 
     Key identifying the statistic. The key type depends on the
-    *key_type* parameter of the ``Snapshot.group_by()`` or
-    ``Snapshot.statistics()`` method.
+    *key_type* parameter of the ``Snapshot.statistics()`` method.
 
 ``count`` attribute: