google-count is a simplistic SEO tool to monitor the coverage for a
particular domain in Google. google-count prints out the current time and
the number of google hits for a particular domain.
Put something like this in your crontab to track a website every hour:
0 * * * * /home/ed/Projects/google-count/google-count id.loc.gov >> /home/ed/Projects/google-count/logs/id.loc.gov
You might be surprised at how much things fluctuate, and how much your traffic changes based on it :-)