2640 microsecond and 17104 microsecond time intervals

can someone please give me any significance of this in regard to the architecture of the arduino microcontrollers

Take home test? Or are you using your mobile phone?

Not sure what you mean, but is this what you want?

arduidiot: can someone please give me any significance of this in regard to the architecture of the arduino microcontrollers

Not unless you provide more information.

Where did you get those numbers?

...R

Google "2640 microsecond and 17104 microsecond" and it will say 19.74400 milliseconds

No, no obvious significance. Clock speed is 16MHz or 8MHz usually.