I know on the Fanuc OM controls I use at work use K value in stead.
K= loop repeat, non-modal
G81 G91 X1. R.05 Z-.073 K5 F4.5
This line of code will drill five holes 1.00 postive on X from previous hole, G91 incremental.
G81 G90 X1. Y-1. R.05 Z-.073 K0 F5.
This line of code will drill no hole on this line but will on the next. However, it will still move the table to X1. Y-1. The machine will pause and move to next hole and start drilling again. Works great on Tap cycle if you do not want to retap a hole when restarting.