Note: This calendar view maps the number of captures of http://www.unesco.org/new/en/communication-and-information/resources/multimedia/photo-galleries/preservation-of-documentary-heritage/photos-memory-of-the-world-register/2013/czech-republic-libri-prohibiti-collection-of-periodicals-of-czech-and-slovak-samizdat-in-the-years-1948-1989/, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.