backup frequency

例句：

1. 1. The backup frequency of the server is set to 5 minutes.
   服务器的备份频率设置为每5分钟一次。
2. 2. The backup frequency of the data center is critical for maintaining system availability.
   数据中心的备份频率对于保持系统可用性至关重要。
3. 3. The backup frequency should be increased to ensure data redundancy.
   应该增加备份频率以确保数据冗余。