Intermittent wipers timing

[Clunk]

It's a 2015 GU Y61 ST. It has intermittent wipers but they are only at several preset switched intervals which I cannot change.
I am assuming these settings would be in the computer somewhere and should be editable, rather than a separate control unit, but that may not be the case.
I will have to investigate further or have a chat with a Nissan man next chance I get to see what (if anything) is possible.

so what's the timing increment of yours as it is now? I find my increments of 2,5, 8 and 11 seconds suffice.............. not that I previously paid any attention to how fast or slow the wipers were going.