Note: This calendar view maps the number of captures of https://accounts.google.com/ServiceLogin?service=mail&passive=true&rm=false&continue=https://mail.google.com/mail/&ss=1&scc=1<mpl=default<mplcache=2&emr=1&osid=1, not how many times the site was actually updated.
Look Up URL in general Internet Archive web collection.