According to Massive Dev Chart. Agitation 1 Minute always, then every 30 s...
Easily compare recipes with the FilmDev Recipe Finder
All FilmDev Recipes
Kodak Tri-X 400 at 800 in Kodak XTOL 1:1
9 minutes, 30 seconds at 20°C/68.0°F
Kodak 2238 in Kodak D-76 stock
8 minutes, 30 seconds at 24°C/75.2°F
Rollei RPX 25 in Agfa Rodinal 1+25
6 minutes at 20°C/68.0°F
Fuji Neopan Acros 100 in Agfa Rodinal 1:25
7 minutes at 20°C/68.0°F