downtime
High availability
Uptime
Mean down time
Planned downtime
Carrier grade
https://source.unsplash.com/featured/?downtime#.png
/suto3/google.icondowntime
/suto3/Google画像検索.icondowntime
/suto3/Google定義検索.icon downtime
/suto3/wikipedia.icondowntime
/suto3/weblio.icon downtime
/suto3/kotobank.icon downtime
/suto3/jisho.icon downtime