Is there a direct relationship with the poverty rate and the rent or frequency of delay payment?

Also consider the frequency and amount of loss. 

May be it hits the natural frequency of the frame.

It depends on if IRS considers you an investor or trader. they look at different factors, I pulled court cases where they looked at these:(1) the taxpayer's investment intent; (2) the nature of the income to be derived from the activity; and (3) the frequency, extent, and regularity of the taxpayer's securities transactions (Kay; Mayer; and Moller)  A taxpayer is a securities trader only when both of the following are true: (1) the taxpayer's trading activity is substantial; and (2) the taxpayer seeks to profit from short-term swings in the daily market movement, rather than to profit from the long-term holding of investments. 

For MLS comps i use proximity and frequency of listing/sale to adjust price.

I've noticed a steady increase in the frequency of unsolicited mailers I receive offering my buy my house ("why worry about repairs, we'll buy you house as is, all cash, quick close" etc., etc.).

Those guys can tell you exactly who the good contractors are and who the ones to avoid are, based on their volume of material purchased, frequency of purchase, and payment history.  

@Alina Trigub Well, the frequency of transactions, especially in the commercial sector, is what would make me have a 2nd job at least at first. 

Age and condition of the property, quality of tenants, and frequency of turnover all influence this cost.  

Buyer has been making very irregular payments (irregular in the frequency and amount).