Searched for https://atom.archives.unesco.org/informationobject/browse?sort=relevance&creators=568&sf_culture=fr 
Note: This calendar view maps the number of captures of https://atom.archives.unesco.org/informationobject/browse?sort=relevance&creators=568&sf_culture=fr, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.