Download the Plot Over Time plugin and you will get a directory called "plotovertime" when you unzip the downloaded file. Upload the "plotovertime" directory to your wordpress plugins directory (e.g. /wp-content/plugins/)
Activate the plugin through the 'Plugins' menu in the WordPress dashboard.
Requires: 3.0 or higher Compatible up to: 3.2.1 Last Updated: 2011-11-22 Downloads: 940