One Step Closer was played for at least 3 TV performances in 2001.
In The End had like 2 exclusive performances in 2001, but was also dropped from a show in 2001 once.
Live 8 2005 had no One Step Closer.
Las Vegas 2007, OSC but no ITE.
2 2009 shows with ITE and no OSC.
OSC was dropped for Madrid 2010.
ITE: -3+2-1+1-1+2+1=1
OSC: 3-2-1+1-2-1=-2
Sorry if that calculation is confusing, In The End wins, but One Step Closer is not just 1 behind.
That all isn't 100% but I think it's save to assume that In The End is the most performed song, I think it's doesn't really matter how far behind One Step Closer exactly.
Maybe I forgot something, I just took a rough look.
Also this is just for the Linkin Park times, we don't know for sure if they started to play ITE and OSC at the same in the HT times.