User-agent: *  # applies to all robot agents
Crawl-delay: 10 # Number of seconds to wait between successive requests
Request-rate: 1/10 # maximum rate is one page every 10 seconds
Visit-time: 0100-2350 # only visit between 1:00 AM and 11:50 PM UT (GMT)

User-agent: Googlebot
Allow: /

User-agent: Googlebot-Image
Disallow: /