Adrian wrote:
Oh, I dunno...

Driver A does 5,000 miles per year, and gets one speeding ticket every
three years.

Driver B does 50,000 miles per year, and gets one speeding ticket per year.

Who gets nicked with greater frequency?

Units of frequency (Hz) are 1/seconds, so driver B, with
about (errm) 0.3e-7 ticket/s, as opposed to 0.1e-7 ticket/s
for driver A.

#Paul