Limit distance

 60sec*60min*24hours*365days

Nealy 3 croresec*300000km

Trillion km

If 99sec*99min*99hout*99days*99months nearly 95 crore*300000km

Quadrillion km

So humen brain can measure 

Time limit

 99sec*99min*99hour*99days*9999years*300000km

Gives nearly 10^18 km max time limit 

Light year

 99*99*99*99*99*9999*300000000

One Light year