Searched for https://www.unesco.org/fr/search?text=&sort_by=search_api_relevance&sort_order=DESC&page=7 
Note: This calendar view maps the number of captures of https://www.unesco.org/fr/search?text=&sort_by=search_api_relevance&sort_order=DESC&page=7, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.