as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
give an example of when it would be appropriate to use the phrase once in a blue moon.
user
the phrase "once in a blue moon" is used to refer to something that is exceedingly rare and unlikely to happen. an example of this phrase being used could be "i only see my grandparents once in a blue moon, so i always look forward to it."
assistant