I'd say, areliable source of "weekly" updates for mass download of subs would be the user Runbkk in Sukebei:
runbkk-posts.
He packages subs together with the movie packs. If you're interested to download only the subs, select the subs from the torrent tree. A very big thank you to him, he has been doing this for several years. Depending on what you mean by "fresh", his packs are usually few weeks after the release.
Another great source for same day release of subs is the discord thread by Heavenazer (Azer). However this is a discord channel, so no mass download, but still fairly easy to get batch of fresh subs.
Heavenazer++subs