wrote in message
ups.com...

The number of nighttime listeners is principally their
local audience and the counts are likely available
from Arbitron or the radio station in question.

arbitron only list 6am to midnight. There's no breakdown available
for nighttime hours, at least none that I can see.

There is data for every hour of the day, but licensed only for use by
Arbitron subscribers. It takes a couple of clicks to get a Midnight to 6 AM
ranker or table. In fact, many stations in large metros with lots of shift
workers consider the prime morning drive time to begin at 5 AM, and they do
a 5 AM to 10 AM drive time table for sales.