Of course, but how is chronic defined and measured, and how has that changed historically? I've heard that the definition is ever-changing. I read the article
"The chronically homeless, on the other hand, are a subset of the homeless population that is often the most vulnerable. These are people who have been living on the streets for more than a year, or four times in the past three years, and who have a "disabling condition" that might include serious mental illness, an addiction or a physical disability or illness."