used to happen, was happening, came to mind
Me llegaban pocas noticias sobre lo demás que ocurría.
I didn’t hear much about what else was going on.
Ocurría que había gente que tenía que parar y dar media vuelta.
It happened that some people had to stop and turn around.
— Stalker (1979)
Me dijo que si le ocurría algo, te lo diera cuando estuvieras listo.
He told me that if anything happened to him, I should give it to you when you were ready.
— Atlantis: El imperio perdido (2001)