Searched for https://ich.unesco.org/fr/4ga?call=recording&file=%2Fsrc%2F20825-OG.mp3&id=20825&include=recording.inc.php&lg_recording=OG
Note: This calendar view maps the number of captures of https://ich.unesco.org/fr/4ga?call=recording&file=%2Fsrc%2F20825-OG.mp3&id=20825&include=recording.inc.php&lg_recording=OG, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.