This code should help you with your problem
The delay between number increments is determined by 'timer'
and will depend on the crystal frequency you choose.

The 7 seg display needs to be a common cathode type.
If you only have a common anode type then invert the display data.

ie  xorlw 0xff

I haven't tested the code, but it should work

Regards

Tony


 list p=16c84,c=140  ; processor type
 errorlevel        1, -(305)
 ;
 ;
status equ 3h
rp0 equ 5h
portb   equ 6h
trisb  equ 86h
intcon equ 0bh
rtif equ 2h
optionreg   equ 81h
 ;
counter equ 0ch
timer equ 0dh
 ;
 org 0h              ; program start
 bsf status,rp0     ; initialise
 clrf trisb
 movlw 7h ; prescale = 1:256
 movwf optionreg
 bcf status,rp0
 clrf portb
 clrf counter
 movlw d'15'
 movwf timer
 bcf intcon,rtif
 ;
loop btfss intcon,rtif   ; wait for RTCC overflow
 goto loop
 ;
bcf intcon,rtif
decfsz timer             ; wait 15 overflow periods
goto loop
 ;
 movlw d'15'            ; reset timer
 movwf timer
 ;
 movf counter,w
 call display            ; get 7 seg data
 movwf portb
 incf counter
 movlw d'10'          ; test for overflow
 xorwf counter,w
 btfsc status,z
 clrf counter          ; clear counter
 goto loop
 ;
 ; 7 Seg data
 ;
display  addwf pcl
 retlw b'00111111'
 retlw b'00000110'
 retlw b'01011011'
 retlw b'01001111'
 retlw b'01100110'
 retlw b'01101101'
 retlw b'01111101'
 retlw b'00000111'
 retlw b'01111111'
 retlw b'01101111'
 ;
 ;
 end


Just when I thought I knew it all,
I learned that I didn't.