How are correspondence games counted for recent activity on the leaderboard?

The lichess FAQ says (lichess.org/faq#leaderboards) that one of the criteria for getting onto a leaderboard is "have played a rated game within the last week for this rating". How does this work for correspondence games? I could think of a few different ways this could be interpreted:

1. Have started a rated game within the last week
2. Have completed a rated game within the last week
3. Have played a move in a rated game within the last week

Could someone clarify how this works for me?

the way it works is there simply aren't any correspondence leaderboards.

Is this not a leaderboard? If it has different rules, then what are the rules for the top 200 list?
lichess.org/player/top/200/correspondence

afaik, this is not linked anywhere on the site. i am honestly surprised it is still there.