Plots timediff in nanosecond in gnuplot

latency.plt

set grid xtics
set grid ytics
set xtics rotate
set yrange[-96000:-122000] 
set format x '%.0f'
set format y "%.f"
set xtics 60
set ytics 5000
set border 3
plot "apr/pd" using (($1/1000000000-1459440000)/60):($3/1000)


set format x '%.0f'
set xtics 3600
set xtics rotate
set ytics 1
set yrange [65:72]
set grid xtics
set grid ytics
plot "tp" u 1:2 smooth bezier, "tp" u 1:3 smooth bezier, "tp" u 1:4 smooth bezier, "tp" u 1:5 smooth bezier, "tp" u 1:6 smooth bezier, "tp" u 1:7 smooth bezier, "tp" u 1:8 smooth bezier, "tp" u 1:9 smooth bezier, "tp" u 1:10 smooth bezier, "tp" u 1:11 smooth bezier, "tp" u 1:12 smooth bezier, "tp" u 1:13 smooth bezier, "tp" u 1:14 smooth bezier, "tp" u 1:15 smooth bezier, "tp" u 1:16 smooth bezier, "tp" u 1:17 smooth bezier, "tp" u 1:18 smooth bezier, "tp" u 1:19 smooth bezier