User-agent: Mediapartners-Google
Crawl-delay: 20

User-agent: Googlebot
Crawl-delay: 20

User-agent: Adsbot-Google
Crawl-delay: 20

User-agent: Googlebot-Image
Crawl-delay: 20

User-agent: Googlebot-Mobile
Crawl-delay: 20

User-agent: MSNBot
Crawl-delay: 30

User-agent: bingbot
Crawl-delay: 60

User-agent: applebot
Crawl-delay: 30

User-agent: Slurp
Crawl-delay: 30

User-agent: Yahoo! Slurp
Crawl-delay: 30

User-Agent: AhrefsBot 
Crawl-Delay: 180

User-Agent: MJ12bot
Crawl-Delay:  180

User-Agent: WASALive-Bot
Crawl-Delay:  180

User-Agent: kulturarw3
Crawl-Delay:  180

User-Agent: PetalBot
Crawl-Delay:  180

User-Agent: SemrushBot
Crawl-Delay:  180

User-Agent: DotBot
Crawl-Delay:  180

User-Agent: BLEXBot
Crawl-Delay:  180