Period v duration

Question

Dear Teachers,I've looked it up on google, but I'm still confused about the difference between period and duration. Could someone explain to me along with the example. Thanks in advance.

Mister Micawber · Accepted Answer

A period is usually of a specific duration.  Other than that, the concept is the same, and use will depend on collocation in specific contexts.

Hendy Gunawan · Answer

Thank you for your enlightenment, Mister Micawber.
Here are some sentences regarding 'period' and 'duration' :
All these changes happened over specific period of time.
All these changes happened over specific duration of time.

Are both sentences above acceptable? Do they have the same meaning?

Thank you.

Mister Micawber · Answer

Hendy GunawanAre both sentences above acceptable?

With the word 'specific', 'duration' becomes odd there. Only 'period' works. Did you not read my first post?

CalifJim · Answer

Hendy Gunawandifference between period and duration

It may help to think of it like this. A period (period of time) is a block of time with a beginning and an ending. Its duration is the amount of time from the beginning to the end, that is, how long the period lasts.

Each season of the year is a period of time. Summer is a period of time during the calendar year. Its duration is three months, i.e., it lasts three months.

The spring break is a period of time. It is usually a week long. That is, its duration is usually one week.

Your lifetime is a period of time from birth to death. We don't yet know the duration of your lifetime.

Periods have durations. Durations don't have periods.

CJ

Period v duration

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