Here's why:
* Nano is a prefix meaning one billionth (1/1,000,000,000). It's used with units like meters (nanometer) and seconds (nanosecond).
* Minute is a unit of time equal to 60 seconds.
If you were to create a "nano minute", it would mean one billionth of a minute, which is a very tiny amount of time. To calculate this, we can do:
* 1 minute / 1,000,000,000 = 0.000000001 minutes
That's a tiny fraction of a second!
It's more likely that someone is using "nano minute" figuratively to describe a very short period of time.