User-agent: Googlebot
Crawl-delay: 20

User-agent: Bingbot
Crawl-delay: 120

User-agent: Yandex
Crawl-delay: 120

User-agent: Slurp
Crawl-delay: 120

User-agent: AhrefsBot
Crawl-delay: 240

User-agent: SemrushBot
Crawl-delay: 240

User-agent: *
Crawl-delay: 300