any data for "days of ownership"?

[sniglet]

There is a lot of focus on the "days on the market", to judge the health of a real-estate market based on how long it takes for homes to sell. However, I wonder if it wouldn't be even more useful to look at the to see average days of ownership to determine how quickly people are turning over their properties.

If the average days of ownership are trending down, that could be a good indicator of a bubble, showing that the market is increasingly dominated by speculators. Anecdotally, I seem to notice a lot of homes coming back up for sale after only a year or two these days. I can't recall so many people eagerly selling their homes so soon after buying in the past.

Is there any place to get an idea of the average days of ownership?