Talk:London 1/2 AP Campaign & High Difficulty Quest/@comment-27353698-20160316214807/@comment-24050152-20160317052233

Higher rate of drop means there are more than the usual amount of timings to get the servant.

For example, in that particular hour,

there are only 5 timeframes (in seconds) that has Mordred in it.

If mordred is a Rate-Up servant, there may be 10 timeframes or more. So, basically, chances of getting her is higher.