How do I make a ghost appear?

[gilmar]

Is it true they appear about once a week? Is there a way to make them appear?
Thank you

[kuronue]

The graves I left on the home lot spawn ghosts nightly. It can take a few days before a specific ghost shows up, but I get 3-4 of them haunting things every night.

[Catangi]

Do you mean on a residential lot?

I had an issue where, after remodeling the Riverview cemetery, the ghosts were not appearing even though that cemetery is full of graves with attached ghosts. They appeared the next time I booted the game though - might be worth trying to save and quit, and restart, if they're not appearing like they should.