How often should I be needing to align my rear tyre?

I had it aligned less than a month ago and it’s wobbly again, I’m a 220lb rider, it’s a 29” wheel, and it’s daily ridden through the city, if that effects how often I align it, I’d need to ask myself if I need to invest in an alignment tool or on a rim that doesn’t pull this crap so often

Dodge for your time