When I was young, the FCC field offices would make annual inspection trips to
AM stations, checking everything, from modulation levels, to exact frequency
(you were allowed plus or minus 30 Hz from your assigned channel, and all the
stations used General Radio frequency meters which had a standard crystal in a
temperature controlled oven, and readjusted the station's frequency every few
days if needed).

The transmitter crystal was also in an oven to control drift. Stations drifting
off channel would cause heterodynes in receivers, and two stations, one off 25
Hz high, the other 25 Hz low would cause an audible 50 Hz hum in receivers
picking up both stations. The growling sound you hear on some AM channels at
night is caused by this.

A station cited by the FCC usually replaced its Chiel Engineer if they failed
the inspection. So it was high stress time.

One thing you should know about US broadcasting: With a very few exceptions
stations East of the Mississippi have call signs that start with "W" and those
west of the Miss, start with "K". So logically KTWG should be West of the
Mississippi.

The FCC inspector arrives at KTWG and measures the power and it falls within
the limits for its 10 kW license (in FM it's plus 5% to -10% of rated power),
and the peak modulation is below 100%. He also checks the Type Approval labels
on the transmitter, and it's OK too. He measures the hum, and it meets specs.
He then pulls out an early frequency counter, with nixie tubes, and measures
the carrier frequency during a moment of no modulation.

801.002 kHz it reads. Silence as the new station manager's face goes white,but
the chief engineer smiles. The station manager moved from Baltimore only a few
weeks earlier, and now he stands a chance of being fired along with engineer.

Why is the engineer smiling?

Note: when this happened everything was "cycles" kilocycles, megacycles, etc.
That does not explain what is going on.