Note: This calendar view maps the number of captures of http://www.unesco.org/culture/ich/index.php?call=recording&call=recording&file=%2Fdoc%2Fsrc%2F27591-FR.mp3&file=%2Fdoc%2Fsrc%2F27597-EN.mp3&id=27591&id=27597&include=recording.inc.php&include=recording.inc.php&lg=en&lg_recording=EN&lg_recording=FR&pg=00008, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.