truthier wording

contrib/templates/default/frontpage.mustache

@@ -42,8 +42,8 @@
                   <tbody>
                     <tr>
                       <th> Board </th>
-                      <th> Post per Hour </th>
-                      <th> Post per Day </th>
+                      <th> Posts this Hour </th>
+                      <th> Posts Today </th>
                       <th> Total </th>
                     </tr>
                     {{# boardgraph}}
@@ -73,4 +73,4 @@
     </div>
     </center>
   </body>
-</html>
+</html>