Fix some minor errors in the docs (GH-24834)

diff --git a/Doc/library/xml.sax.handler.rst b/Doc/library/xml.sax.handler.rst
index 3746a58..59d0d1b 100644
--- a/Doc/library/xml.sax.handler.rst
+++ b/Doc/library/xml.sax.handler.rst
@@ -50,7 +50,7 @@
 
 .. class:: LexicalHandler
 
-   Interface used by the parser to represent low freqency events which may not
+   Interface used by the parser to represent low frequency events which may not
    be of interest to many applications.
 
 In addition to these classes, :mod:`xml.sax.handler` provides symbolic constants