docstring fixups

Author: jbrockmendel

pandas/core/frame.py

@@ -13810,8 +13810,8 @@ def quantile(
         0.1  1    1
         0.5  3  100
 
-        Specifying `numeric_only=False` will also compute the quantile of
-        datetime and timedelta data.
+        Specifying `numeric_only=False` will compute the quantiles for all
+        columns.
 
         >>> df = pd.DataFrame(
         ...     {

pandas/core/series.py

@@ -3112,8 +3112,8 @@ def combine(
 
         Combine the Series and `other` using `func` to perform elementwise
         selection for combined Series.
-        `fill_value` is assumed when value is missing at some index
-        from one of the two objects being combined.
+        `fill_value` is assumed when value is not present at some index
+        from one of the two Series being combined.
 
         Parameters
         ----------