In my era it was a year, six months of BUD/S Training, followed by a six month probationary period, which included successful completion of what was then called SEAL Basic Indoctrination in-house at the east or west coast SEAL Teams.
My understanding is that with the past decade’s war footing, it’s a lot faster, and deployed platoons are lucky to go overseas with even a couple of experienced frogs. The “new guy” ratio in the platoons is at an all-time high.
When I was in the 5th grade at Maude Saunders elementary school they allowed us to order a free paperback book from a list. I can’t recall how often but I got several.
One was about Italian Frogmen in WWII. I can’t remember a whole lot about them but do recall just how successful they were. Another was about German Frogmen and their far less successful attempts on the pontoon bridges over the Rhine.
I suspect swimming in the Rhine was particularly difficult as my Father told me you could put your hand down in the water and it would splash up.
I guess being on the losing side didn’t help their publicity either.
Are you sure that's what they are called? :)