diff --git a/doc/source/development/contributing_docstring.rst b/doc/source/development/contributing_docstring.rst
index 6524e4da2299d..1b8513914f462 100644
--- a/doc/source/development/contributing_docstring.rst
+++ b/doc/source/development/contributing_docstring.rst
@@ -695,10 +695,10 @@ and avoiding aliases. Avoid excessive imports, but if needed, imports from
 the standard library go first, followed by third-party libraries (like
 matplotlib).
 
-When illustrating examples with a single ``Series`` use the name ``s``, and if
+When illustrating examples with a single ``Series`` use the name ``ser``, and if
 illustrating with a single ``DataFrame`` use the name ``df``. For indices,
 ``idx`` is the preferred name. If a set of homogeneous ``Series`` or
-``DataFrame`` is used, name them ``s1``, ``s2``, ``s3``...  or ``df1``,
+``DataFrame`` is used, name them ``ser1``, ``ser2``, ``ser3``...  or ``df1``,
 ``df2``, ``df3``... If the data is not homogeneous, and more than one structure
 is needed, name them with something meaningful, for example ``df_main`` and
 ``df_to_join``.
@@ -731,8 +731,8 @@ positional arguments ``head(3)``.
 
             Examples
             --------
-            >>> s = pd.Series([1, 2, 3])
-            >>> s.mean()
+            >>> ser = pd.Series([1, 2, 3])
+            >>> ser.mean()
             2
             """
             pass
@@ -744,8 +744,8 @@ positional arguments ``head(3)``.
 
             Examples
             --------
-            >>> s = pd.Series([1, np.nan, 3])
-            >>> s.fillna(0)
+            >>> ser = pd.Series([1, np.nan, 3])
+            >>> ser.fillna(0)
             [1, 0, 3]
             """
             pass
@@ -756,10 +756,10 @@ positional arguments ``head(3)``.
 
             Examples
             --------
-            >>> s = pd.Series([380., 370., 24., 26],
+            >>> ser = pd.Series([380., 370., 24., 26],
             ...               name='max_speed',
             ...               index=['falcon', 'falcon', 'parrot', 'parrot'])
-            >>> s.groupby_mean()
+            >>> ser.groupby_mean()
             index
             falcon    375.0
             parrot     25.0
@@ -776,8 +776,8 @@ positional arguments ``head(3)``.
 
             Examples
             --------
-            >>> s = pd.Series('Antelope', 'Lion', 'Zebra', np.nan)
-            >>> s.contains(pattern='a')
+            >>> ser = pd.Series('Antelope', 'Lion', 'Zebra', np.nan)
+            >>> ser.contains(pattern='a')
             0    False
             1    False
             2     True