Early designs simply counted down for a specific period of time.

Each type of rock, according to the theory, formed during a specific period in Earth history.

This article is about the specific period from 1750 to 1820.

The crying often increases during a specific period of the day, particularly the early evening.

Terms usually include a specific period of time and a predetermined rate.

Certain types of spiritual forces are beneficial during a specific period.

A sentence could be for life or a specific period.

Other times, the buyer does not actually own anything but only has a right to use the property for specific period.

In private schools the number of students is few, the teacher can give specific period to a student.

"Unless the word was associated with a specific period of their lives, such as military service."