What is the time period called during which the surviving spouse of the insured does not receive social security income benefits?

It's called Blackout period.

Explanation:

When a surviving spouse is caring for a child under 16 years old, he/she can receive social security benefits. However, when the youngest child reaches age 16, these benefits stop. The benefit starts again when the surviving spouse reaches age 60.

the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.