FIX

jklymak · jklymak · commit 1b9212576edb · 2019-02-07T18:58:06.000-08:00
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -613,8 +613,7 @@ def secondary_xaxis(self, location, *, functions=None, **kwargs):
         Examples
         --------
 
-        Add a secondary axes that shows both wavelength for the main
-        axes that shows wavenumber.
+        The main axis shows frequency, and the secondary axis shows period.
 
         .. plot::
 
