Google Maps API v3 での OVER_QUERY_LIMIT エラーを回避するにはどうすればよいですか?

<code class="javascript">function codeAddress(vPostCode) {
    if (geocoder) {
        setTimeout(function() {
            geocoder.geocode({ 'address': "'" + vPostCode + "'"}, function(results, status) {
                // Code for handling the geocoding result
            });
        }, 2000);
    }
}</code>

http://acleach.me.uk/gmaps/v3/plotaddresses.htm

<code class="javascript">  function getAddress(search, next) {
    geo.geocode({address:search}, function (results,status)
      { 
        // If that was successful
        if (status == google.maps.GeocoderStatus.OK) {
          // Lets assume that the first marker is the one we want
          var p = results[0].geometry.location;
          var lat=p.lat();
          var lng=p.lng();
          // Output the data
            var msg = 'address="' + search + '" lat=' +lat+ ' lng=' +lng+ '(delay='+delay+'ms)<br>';
            document.getElementById("messages").innerHTML += msg;
          // Create a marker
          createMarker(search,lat,lng);
        }
        // ====== Decode the error status ======
        else {
          // === if we were sending the requests to fast, try this one again and increase the delay
          if (status == google.maps.GeocoderStatus.OVER_QUERY_LIMIT) {
            nextAddress--;
            delay++;
          } else {
            var reason="Code "+status;
            var msg = 'address="' + search + '" error=' +reason+ '(delay='+delay+'ms)<br>';
            document.getElementById("messages").innerHTML += msg;
          }   
        }
        next();
      }
    );
  }</code>