diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Measure/Frequency.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Measure/Frequency.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,86 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category  Zend
+ * @package   Zend_Measure
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd     New BSD License
+ * @version   $Id: Frequency.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * Implement needed classes
+ */
+require_once 'Zend/Measure/Abstract.php';
+require_once 'Zend/Locale.php';
+
+/**
+ * Class for handling flow volume conversions
+ *
+ * @category   Zend
+ * @package    Zend_Measure
+ * @subpackage Zend_Measure_Frequency
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Measure_Frequency extends Zend_Measure_Abstract
+{
+    const STANDARD = 'HERTZ';
+
+    const ONE_PER_SECOND        = 'ONE_PER_SECOND';
+    const CYCLE_PER_SECOND      = 'CYCLE_PER_SECOND';
+    const DEGREE_PER_HOUR       = 'DEGREE_PER_HOUR';
+    const DEGREE_PER_MINUTE     = 'DEGREE_PER_MINUTE';
+    const DEGREE_PER_SECOND     = 'DEGREE_PER_SECOND';
+    const GIGAHERTZ             = 'GIGAHERTZ';
+    const HERTZ                 = 'HERTZ';
+    const KILOHERTZ             = 'KILOHERTZ';
+    const MEGAHERTZ             = 'MEGAHERTZ';
+    const MILLIHERTZ            = 'MILLIHERTZ';
+    const RADIAN_PER_HOUR       = 'RADIAN_PER_HOUR';
+    const RADIAN_PER_MINUTE     = 'RADIAN_PER_MINUTE';
+    const RADIAN_PER_SECOND     = 'RADIAN_PER_SECOND';
+    const REVOLUTION_PER_HOUR   = 'REVOLUTION_PER_HOUR';
+    const REVOLUTION_PER_MINUTE = 'REVOLUTION_PER_MINUTE';
+    const REVOLUTION_PER_SECOND = 'REVOLUTION_PER_SECOND';
+    const RPM                   = 'RPM';
+    const TERRAHERTZ            = 'TERRAHERTZ';
+
+    /**
+     * Calculations for all frequency units
+     *
+     * @var array
+     */
+    protected $_units = array(
+        'ONE_PER_SECOND'        => array('1',             '1/s'),
+        'CYCLE_PER_SECOND'      => array('1',             'cps'),
+        'DEGREE_PER_HOUR'       => array(array('' => '1', '/' => '1296000'), '°/h'),
+        'DEGREE_PER_MINUTE'     => array(array('' => '1', '/' => '21600'),   '°/m'),
+        'DEGREE_PER_SECOND'     => array(array('' => '1', '/' => '360'),     '°/s'),
+        'GIGAHERTZ'             => array('1000000000',    'GHz'),
+        'HERTZ'                 => array('1',             'Hz'),
+        'KILOHERTZ'             => array('1000',          'kHz'),
+        'MEGAHERTZ'             => array('1000000',       'MHz'),
+        'MILLIHERTZ'            => array('0.001',         'mHz'),
+        'RADIAN_PER_HOUR'       => array(array('' => '1', '/' => '22619.467'), 'rad/h'),
+        'RADIAN_PER_MINUTE'     => array(array('' => '1', '/' => '376.99112'), 'rad/m'),
+        'RADIAN_PER_SECOND'     => array(array('' => '1', '/' => '6.2831853'), 'rad/s'),
+        'REVOLUTION_PER_HOUR'   => array(array('' => '1', '/' => '3600'), 'rph'),
+        'REVOLUTION_PER_MINUTE' => array(array('' => '1', '/' => '60'),   'rpm'),
+        'REVOLUTION_PER_SECOND' => array('1',             'rps'),
+        'RPM'                   => array(array('' => '1', '/' => '60'), 'rpm'),
+        'TERRAHERTZ'            => array('1000000000000', 'THz'),
+        'STANDARD'              =>'HERTZ'
+    );
+}