xtrapbot (a build on top of xtrapchar) is a utility that injects key events
given a word using a Guassian distributed or Uniform distributed durations
and inter-key timings, the usage is pretty simple, see xtrapbot -h:

xtrapbot -- X bot generating user specified PDF based words
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-w word	The word that you want to generate.
-n num	The number of instances you want to generate.
-s[mean_0,noi_0]...[mean_n,noi_n]
	Simple noisy emission.
	The parameters are the mean/maximum .oise of each letter in word.
-g[mean_0,std_0]...[mean_n,std_n]
	Gaussian emission.
	The parameters are the mean/standard diviation of each letter in word.
-i[mean0,ns_0]...[mean_n,ns_n]
	Gaussian or Noisy inter-key timings.
	The type on distribution depends on weather -s or -g was used.
-v	Enable verbose messages.
-h	This message.
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