With an f/158 pinhole, in broad daylight, I would wager about 1s exposure time.
I use the Zero 2000 6x6 camera, which has an f/138 aperture, and with Plus-X / Foma 100 / Acros / TMax 100 I shot it at about 1s in bright sunlight. That worked pretty well. A bit over-exposed, but it was the slowest I could open and close the manual shutter with any accuracy. Beyond broad daylight you'd have to use a meter.
I have not used the Fuji 160NS, but since it's similar speed one second seems a reasonable starting point there too.
For the Zone plate, you'd be more like between 1/15 and 1/8 second exposure since it has a larger effective aperture.