How often does Prosper increase credit limit?

I'm curious to know how often Prosper reviews and potentially increases credit limits for its borrowers. Do they have a set schedule for these evaluations, such as once a year or every six months? Or does it depend on individual borrower performance and other factors? It would be great to get a clearer understanding of how Prosper manages credit limits to ensure that borrowers have access to the capital they need while also mitigating risk for investors.