diff --git a/htroot/SearchStatistics_p.html b/htroot/SearchStatistics_p.html
index baa1ba35e..55ca67989 100644
--- a/htroot/SearchStatistics_p.html
+++ b/htroot/SearchStatistics_p.html
@@ -57,12 +57,14 @@
       <tr class="TableHeader">
         <td>Requesting Host</td>
         <td>Count</td>
+        <td>Queries Per Last Hour</td>
         <td>Access Dates</td>
       </tr>
       #{list}#
       <tr class="TableCell#(dark)#Light::Dark#(/dark)#">
         <td>#[host]#</td>
         <td>#[count]#</td>
+        <td>#[qph]#</td>
         <td>#{dates}##[date]# #{/dates}#</td>
       </tr>
       #{/list}#
@@ -104,6 +106,7 @@
         <td>Requesting Host</td>
         <td>Peer Name</td>
         <td>Count</td>
+        <td>Queries Per Last Hour</td>
         <td>Access Dates</td>
       </tr>
       #{list}#
@@ -111,6 +114,7 @@
         <td>#[host]#</td>
         <td>#[peername]#</td>
         <td>#[count]#</td>
+        <td>#[qph]#</td>
         <td>#{dates}##[date]# #{/dates}#</td>
       </tr>
       #{/list}#
diff --git a/htroot/SearchStatistics_p.java b/htroot/SearchStatistics_p.java
index 1a0ba9114..5129e1e04 100644
--- a/htroot/SearchStatistics_p.java
+++ b/htroot/SearchStatistics_p.java
@@ -106,6 +106,8 @@ public class SearchStatistics_p {
                 	dateCount++;
                 }
                 prop.put("page_list_" + entCount + "_dates", dateCount);
+                int qph = handles.tailSet(new Long(System.currentTimeMillis() - 1000 * 60 * 60)).size();
+                prop.put("page_list_" + entCount + "_qph", qph);
                 
                 prop.put("page_list_" + entCount + "_dark", ((dark) ? 1 : 0) ); dark =! dark;
                 prop.put("page_list_" + entCount + "_host", host);
diff --git a/htroot/SearchStatistics_p.xml b/htroot/SearchStatistics_p.xml
index e4ced47c1..7ed6f8d5a 100644
--- a/htroot/SearchStatistics_p.xml
+++ b/htroot/SearchStatistics_p.xml
@@ -17,6 +17,7 @@
 	  <localSearchTracker>#{list}#
 	    <host>#[host]#</host>
         <count>#[count]#</count>
+        <qph>#[qph]#</qph>
         <dates>#{dates}#
         	<date timestamp="#[timestamp]#">#[date]#</date>
         #{/dates}#</dates>
@@ -27,7 +28,7 @@
 	  	<host>#[host]#</host>
         <peername>#[peername]#</peername>
         <date timestamp="#[timestamp]#">#[date]#</date>
-        <querycount>#[querycount]#</>
+        <querycount>#[querycount]#</querycount>
         <resultcount>#[resultcount]#</resultcount>
         <querytime>#[querytime]#</querytime>
         <resulttime>#[resulttime]#</resulttime>
@@ -36,6 +37,12 @@
 	  
 	  ::<!-- 4: Search Statistics: Remote Search Tracker -->
 	  <remoteSearchTracker>#{list}#
+	    <host>#[host]#</host>
+        <count>#[count]#</count>
+        <qph>#[qph]#</qph>
+        <dates>#{dates}#
+        	<date timestamp="#[timestamp]#">#[date]#</date>
+        #{/dates}#</dates>
 	  #{/list}#</remoteSearchTracker>
 
 #(/page)#
diff --git a/source/de/anomic/plasma/plasmaSwitchboard.java b/source/de/anomic/plasma/plasmaSwitchboard.java
index 7ab51afe7..148db31c1 100644
--- a/source/de/anomic/plasma/plasmaSwitchboard.java
+++ b/source/de/anomic/plasma/plasmaSwitchboard.java
@@ -241,7 +241,7 @@ public final class plasmaSwitchboard extends serverAbstractSwitch implements ser
     public  plasmaDHTFlush              transferIdxThread = null;
     private plasmaDHTChunk              dhtTransferChunk = null;
     public  ArrayList                   localSearches, remoteSearches; // array of search result properties as HashMaps
-    public  HashMap                     localSearchTracker, remoteSearchTracker;
+    public  HashMap                     localSearchTracker, remoteSearchTracker; // mappings from requesting host to a TreeSet of Long(access time)
     public  long                        startupTime = 0;
     public  long                        lastseedcheckuptime = -1;
     public  long                        indexedPages = 0;
@@ -3028,6 +3028,14 @@ public final class plasmaSwitchboard extends serverAbstractSwitch implements ser
         
     }
     
+    public static int accessFrequency(HashMap tracker, String host) {
+    	// returns the access frequency in queries per hour for a given host and a specific tracker
+    	long timeInterval = 1000 * 60 * 60;
+    	TreeSet accessSet = (TreeSet) tracker.get(host);
+    	if (accessSet == null) return 0;
+    	return accessSet.tailSet(new Long(System.currentTimeMillis() - timeInterval)).size();
+    }
+    
     public void startTransferWholeIndex(yacySeed seed, boolean delete) {
         if (transferIdxThread == null) {
             this.transferIdxThread = new plasmaDHTFlush(this.log, this.wordIndex, seed, delete,