I'm not sure exactly what type of decision you are trying to find short term and long term for, but for business decisions short term is zero to three months, and long term is anything over a year.
A short-term visa is usually used for tourism or travels that are temporary in other countries, whereas a long-term visa is typically used for longer residency in these countries. However, the...
It is dependent on the terms of the policy. There can be a defined number of years, or it could be based on the date of Social Security retirement eligibility.