Number + 分钟
分钟 (fēnzhōng) is the standard classifier and noun for 'minute' as a unit of time. It is placed after a number to indicate a duration. For example, 几分钟后 means 'after a few minutes.'
等我五分钟,我马上就好。
Děng wǒ wǔ fēnzhōng, wǒ mǎshàng jiù hǎo.
Wait for me five minutes; I'll be ready right away.
从这里走到地铁站大概要十分钟。
Cóng zhèlǐ zǒu dào dìtiě zhàn dàgài yào shí fēnzhōng.
It takes about ten minutes to walk from here to the subway station.
她迟到了二十分钟,非常不好意思。
Tā chídào le èrshí fēnzhōng, fēicháng bù hǎoyìsi.
She was twenty minutes late and felt very embarrassed.