With the most common North American accent "would've" and "would of" sound very similar. My suspicion is that the error tends to arise in people that have learned language more from speaking than reading.
In my instance, that would have a strong correlation and never read fictional material, autistic spectrum imagination thing for me, but love burning thru an RFC.
So in my instance, I would tend to agree with that observation and support that as a large factor from personal experience.
No, it's an error. "Woulda" is the correct way of spelling a regionalism. "Would of" is an incorrect spelling of "would've", which is a contraction of "would have".
So in my instance, I would tend to agree with that observation and support that as a large factor from personal experience.