LMC555: Expected accuracy at longer time intervals

Part Number:LMC555

Hello,

I have a customer wanting to use a LMC555CMM/NOPB in order to have a one-shot timer with length no shorter than 8.13 seconds.

The datasheet specifies the LMC555 timer accuracy at only one set point (5V, 1.1ms set - 1.0ms min and 1.2ms max).

What can the timing accuracy be expected to be at lets say 8.66 second set point? 

Thanks,

Reed