Arcade is completely focused on the participation of its users, and multiple proofreading is done to improve its accuracy.
Such proofreading is done by the users themselves, and Flitto does not get involved until the proofreading is completed.
In Conversation, every user who can participate can also participate in proofreading.
For the translations, however, only those who have been confirmed as Intermediate or higher can participate in proofreading.
This means that the total amount of time it takes for proofreading can vary from few days to few months depending on how active other users are and how many sentences still need to be proofread.