How many "centimeters" of time separated the dinosaurs and humans on Earth?

From the quote marks you put around "centimeters", I can see that you

understand that 'centimeters' is not actually a unit of time, and that you're

using it to represent some actual legitimate unit of time.

But you haven't explained the relationship between the word you used and

the unit you're using it to represent, so I don'[t have the information I need

to make the conversion.