It seems like your question is missing some context. Could you clarify what "they" refers to and what specific occurrence or event you are asking about? This will help me provide an accurate answer.
365
10500/year
In the normal year, there are 365 days.
31,536,000 in a normal year or 31,622,400 in a leap year.
There are approximately 52 weeks in a year.
Many year explore.
How many what in a leap year?
Months is plural when discussing the number. "How many months are in a year?"
There are many thousands every year
how many litters do hyenas have in a year
The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.The year 2000 was the last year of the 20th century, not 1999 as many people mistakenly think.
thay have many many many
One
365
there are 12months in a year
however many weeks there are in a year
how many people get bronchitis per year