Expanding Timer1 counting range

[sycluap]

I use Timer1 as a free running timer, using 4Mhz clock and 16F877A MCU. I do not know how to extend the timer range as it is from 0 to 65536 microsecond using 4Mhz clock.

Can anyone teach me to extend the timer range from 0 to 5 seconds?

Thanks in advance.