Clock A has a frequency of 10MHz. It has a stability of 2*10^-11.

Clock B has a frequency of 10MHz. It has perfect stability, and does not drift. This is our reference.

The clocks are synchronized, and triggered simultaneously.

How many years before clock A has become asynchronous by 10MHz relative to clock B?

The problem is that my software (MS Excel) and calculator cannot calculate this. MS Excel rounds the number when dealing with 2*10^-11, and my calculator overflows.

I was hoping somebody whom has the tools to do it can do this calculation. I am getting pretty frustrated trying to convert to pHz and uHz and all sorts to try to prevent the rounding of the numbers in Excel.

Thank you for your time.

Kind regards,

Marius