Replace "period" with actual period caption.

apachedex/__init__.py

@@ -993,8 +993,8 @@ def asHTML(out, encoding, per_site, args, default_site, period_parameter_dict,
       ):
     out.write('<tr><th class="text">%s</th><td>%s</td></tr>' % (
       caption, value))
-  out.write('</table><h2>Hits per period</h2><table class="stats">'
-    '<tr><th>date</th><th>hits</th></tr>')
+  out.write('</table><h2>Hits per %s</h2><table class="stats">'
+    '<tr><th>date</th><th>hits</th></tr>' % period)
   hit_per_day = defaultdict(int)
   x_min = LARGER_THAN_INTEGER_STR
   x_max = None