It is odd that a state capital only got two Class C stations in the commercial band, 97.5 WCOS-FM and 104.7 WNOK. And 104.7 is only 92 miles from another Class C, 104.7 in Charlotte. Other Class Cs were able to move into the Columbia market from smaller towns nearby, 101.3 WWDM Sumter, 106.7 WTCB Orangeburg and 107.5 WNKT Eastover (originally St. George). And there are two 100,000 watt stations in the non-commercial band, NPR affiliate 91.3 WLTR and K-Love outlet 89.7 WMHK.
Was someone at the FCC mad at Columbia? But because Columbia is less than 100 miles from several other markets, Charlotte, Charleston, Greensville-Spartanburg and Augusta, that's likely the reason.
In terms of TV, Columbia only got one VHF station, Channel 10 WIS-TV. All its other stations were on the UHF band. Charleston got four VHFs, Greenville-Spartanburg got three, and Charlotte and Augusta each got two.
Maybe Charlotte feels slighted by the FCC with only two VHF channels! I'm pretty sure that's the smallest number for what is today a major U.S. city. Of course, with digital television, UHF is now the preferred television band.