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I seem to have a hard time recognizing when to choose either にわたって or を通じて in
the following question:

> この地方は一年（ ）暖かく、とても過ごしやすい。

The correct answer is を通じて. My idea is that を通じて would make this say
"throughout this year". With にわたって, I thought that it would be "Over the
course of one year". Yet, I'm thinking that these are incorrect. What is the
difference between these two words with respect to time? Also, what would be
the correct translation for this phrase?
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2012-08-03T06:42:56.690
6383
2019-07-14T15:44:57.003
1328
question
grammar usage translation
When is it appropriate to choose にわたって or を通じて in regard to time?
* にわたって expresses the duration of a single **ongoing** project/activity.

> 試験のために、一年にわたって勉強した。  
>  I spent a year studying (possibly taking holiday breaks) for the exam.
>
> ここは40000年に渡って氷河期で、凍っていた。  
>  This place has been in an ice age and was frozen for 40000 years.

  * を通じて means that multiple instances of a single event or a single state are **repeated consistently** throughout the time span.

> 試験のために、一年を通じて勉強した。  
>  I studied throughout the year without taking a holiday break (possibly for
> a few years) for the exam.
>
> ここは1年を通じて凍る。  
>  This place is frozen for the whole year.
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2012-08-03T07:32:52.980
6385
2019-07-14T15:44:57.003
2019-07-14T15:44:57.003
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answer
…にわたって specifies the length of a period for which an event or a state
continues. 一年にわたって暖かい would mean “warm for one year,” and maybe it is not warm
after one year.

一年を通じて means “all the year round” (≈ no matter which day in the year it is),
and it does not specify the length of a period for which an event or a state
continues. 一年 just specifies a period of a single unit. We also say 一日を通じて,
一月を通じて, 一週間を通じて, 四季を通じて, and so on.
CC BY-SA 3.0
2012-08-03T12:19:40.137
6386
2012-08-03T12:19:40.137
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answer