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/20110106223412/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/clockspeed
Clock Speed is the term used to measure the rate that a processor can complete it's processing cycles. They are normally measured in Megahertz (1,000,000 cycles per second) and Gigahertz (1,000,000,000 cycles per second).