I completely cycled my 125 gallon in about 5 days with a seeded sponge filter and seachem stability.
Every tank is different... Depends a lot on ph and other factors... seeded media from an established tanks helps a bunch too, but isn't necessary.
I would say... with seachem stability (remember you can dose with Seachem Prime with stability, which makes cycling a lot less stressful on fish) you would expect to see a nitrite reading in about 5-7 days, and be cycled in about 7-10 days.
I did a fishless cycle in about 12 days with Tetra Safe Start, but I found it less stable than stability, as you can only add it once and wait, while with stability you add it every day until you are cycled, and you can do water changes and use prime without killing it.