The largest amount of accidents happen over the New Years holiday.
New Year's holiday is when the most accidents happen each year.
■キーワード
年末年始 = New Year's holiday
事故 = accident(s)
①The largest amount of accidents happen over the New Years holiday.
→ 年末年始に事故が一年で一番起きます。
②New Year's holiday is when the most accidents happen each year.
→事故が一番多い時期は年末年始になります。
③1年で1番事故の多い時期
→The time of year with the most accidents.
More traffic accidents happen around New Year's than at other times of the year.
"More traffic accidents happen around New Year's than at other times of the year."
Happen - occur or take place
Around New Year's - meaning in the days before and after New Year's day.
Other times of year - This can refer to other holidays or just any other single day in the year.
"More traffic accidents happen around New Year's than at other times of the year."（年末年始はその他の時期に比べて事故が多いです）
Happen - 起こる
Around New Year's - 年末年始
Other times of year - その他の日・祝日を表します。
The biggest amount of traffic accidents happen over the New Years holiday.
The majority of traffic accidents happen over the New Year holiday.
The two sentences you see provided above are great ways to express to your listener that the largest amount of traffic accidents happen during the New Year holiday. In the second sentence you will see the word majority. This means the largest number. This word is appropriate for both formal and informal settings.
The traffic accident rate increases over the New Year holidays.
Rate' means 'level'. You could also say 'There are many more traffic accidents over the New Year holidays than any other time of year.'
"rate (割合)"は"level (レベル、程度)"のことを意味します。
また、次のように言うこともできるでしょう。
'There are many more traffic accidents over the New Year holidays than any other time of year. (年末年始は他のどの時期よりも交通事故が多いです)'
During the New Year holidays, the largest number of traffic accidents occur.
If you would like to explain that many accidents happen over the New Year holidays, you can say:
"During the New Year holidays, the largest number of traffic accidents occur."
年末年始に事故が多いことを説明したいなら、次のように言えます。
"During the New Year holidays, the largest number of traffic accidents occur."
（年末年始が交通事故が一番多いです）
Did you know that most traffic accidents happen over the New Year break?
It's a fact that the highest incidence of traffic accidents occurs around New Year
Most traffic accidents happen over the New Year holidays - and you would like to explain that point. Any of the above suggested statements is fine for this situation.
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イギリス 
