--- /dev/null
+#!/usr/bin/gnuplot
+
+filename = "keystroke-timestamps.log"
+bucket_size = 300 # Display resolution, in seconds
+timezone_offset = -7 * 3600 # UTC-7, North American Pacific Daylight Time
+
+set timefmt "%s"
+set xdata time
+set grid
+set autoscale fix
+unset key
+
+plot "< awk '{ print int($1 / ".bucket_size.") }' \"".filename."\" \
+ | uniq -c \
+ | awk '{ print $2 * ".bucket_size.", $1 }' \
+ | fill-in ".bucket_size \
+ using ($1 + timezone_offset):2 with lines
+
+# (fill-in is https://chkno.net/fill-in )
+
+pause -1 "Press enter to dismiss"