Searched for https://unesdoc.unesco.org/ark:/48223/pf0000374518?posInSet=1&queryId=1e0be1be-4502-459c-ad73-1a573d03f05f 
Note: This calendar view maps the number of captures of https://unesdoc.unesco.org/ark:/48223/pf0000374518?posInSet=1&queryId=1e0be1be-4502-459c-ad73-1a573d03f05f, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.