I use it for a long time for my night printing session. you may also remind that Ansel adams in is priting book write that he store print in cold water, waiting for the end of the session and the final archival sequence.
I did some test on my archival sequence and I finally have an archivable print .
I wash my print by making 12 changement of water. That's take me some time as I squege each print before putting it in a new water bath. Butusing this system I get an archivable print after 9 baths . SO I just add 3 to be sure.