Teacher:In this task, we ask you to write an implausible answer to 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. Even though there exist multiple wrong answers, we only need a single wrong answer. Please try to keep your "answer" as simple as possible. Concise and simple "answer" is preferred over those complex and verbose ones.
Teacher: Now, understand the problem? Solve this instance: Sentence: Bin Laden and his aides did not need a very large sum to finance their planned attack on America. 
Question: How often did they meet to plan the attack?
Student:
they met once a year to plan the attack.