I saw the RR database for the Putnam County school busses as 46.52 MHz with the ctcss of 114.8 under the callsign of KNGV847 which you obviously saw also. I ran the callsign in the FCC genmen database & it
listed 46.52 MHz along with 45.08 MHz & 155.055 MHz for public safety use countywide. For Bradford County I found the following frequencies on cityfreq. 463.375 MHz under the callsign of WPYY949 & 155.22 MHz under the callsign of WNJS472 both listed for the Bradford County school board & both were confirmed by crossreferencing them with the FCC genmen database, there was no mention any of these frequencies being assigned for school bus transportation services though. Sorry I couldn't produce more accurate results for you.
FLRAILMAN
www.fcc.gov
www.cityfreq.com