There are twelve months in a year and I like best.

一年有时二个月，我最喜欢二月。

youdao

2010 was a year that ended without any silverware for Ronaldo, but in spite of this, few would dispute that the Madeira native had an outstanding twelve months, statistically if nothing else.

对于罗纳尔多来说，2010是两手空空的一年。尽管如此，很少有人会否认马德拉人在过去12个月中的出色表现，即使仅从数据上看。

youdao

If you do it in monthly terms your interest rate is r/12 because there are twelve months in a year.

如果是每月还款那么月利率是r/12,因为一年有12个月

耶鲁公开课 - 金融市场课程节选

The consumer price index (CPI) increased 2.4 percent over the twelve months ending in February, down from 3.6 percent a year earlier.

NPR: Bernanke: U.S. Growth 'Moderate' as Inflation Rises

Most important, inflation remains subdued at just 1.9% in the twelve months to March, below the 2.5%-a-year target set by the chancellor.

ECONOMIST: Interest rates

For example, core CPI inflation over the twelve months ending in February was 2.7 percent, up from 2.1 percent a year earlier.

NPR: Bernanke: U.S. Growth 'Moderate' as Inflation Rises