Detailed Instructions: Provided the input sentence, you're expected to write a question that involves event "frequency", which refers to how often an event is likely to be repeated. For example, "taking showers" typically occurs ~5 times a week, "going to Saturday market" usually happens every few weeks/months, etc. Don't create questions which have explicit mentions of answers in the text. Instead, it has to be implied from what is given. In other words, we want you to use "instinct" or "common sense". Also, the written questions are not required to have a single correct answer.
Problem:Sentence: During this incident , Seki does n't realize he's being watched by Number 13 , but as soon as he does , Number 13 kills him .
Solution:
How often has Number 13 watched Seki?