how evs work in pokemon sword and shield?
For every hour your Pokémon is doing a job, you get 4 EVs. The game will not specifically tell you how much time you're sending your Pokémon away, instead prompting you to send them to work for a “short” time or a “very long” time, but here's a translation of what that all means: A little while: 1 hour (4 EVs)