Note: This calendar view maps the number of captures of http://portal.unesco.org/unesco/ev.php?EXIT_URL_DO=DO_TOPIC&EXIT_URL_ID=12024&EXIT_URL_SECTION=208&URL_DO=DO_EMAIL_FRIEND&URL_ID=12024&URL_SECTION=208&reload=1553024798, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.