The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Web wide crawl with initial seedlist and crawler configuration from October 2010
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20110106213047/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/hit
A Hit is the term used to describe a file request that is on a webserver. Hits are not an accurate way of counting the traffic to your web site however as each graphic file and HTML document will be classed as one hit.