Meanings
Usage patterns
雨がポツポツ(と)降るfor rain to fall in scattered, isolated drops
I looked up at the sky, and rain started falling in scattered drops.
〈事〉をポツポツ(と)話すto talk about something little by little, haltingly
He began to talk about the old days little by little.
〈物〉がポツポツ(と)建つfor things (e.g. houses) to be dotted here and there
There are houses dotted here and there around that area.
〈場所〉にポツポツができるfor spots or dots to appear on a surface
Little spots appeared on my face.