Examples

第五个年头

the fifth year → 个

他到武汉已经三个年头了。

It's three years since he came to Wuhan. → 年头

她干这一行有年头了。

She has been doing this sort of work for years. → 年头

那年头

in those days → 年头

他从事翻译有年头了。

He's been doing translation for years. → 年头

那年头，日子不好过。

In those days, life was hard. → 年头

年头我来过一次，你不在。 → 年头

他在副处长的位子上已有年头了。 → 位子

October 22 marks the 70th anniversary of the day the Red Army of China successfully finished the Long March.

10月22日标志着中国红军长征胜利已经走过了70个年头了。 → red

That apartment was too old and it was falling to bits.

那套房子有年头了，正在慢慢坍塌。