From Wikipedia (just the A demon said to work on behalf of Belphegor, Lucifer or Satan to introduce errors into the work of scribes…has also been described as collecting idle chat that occurs during church service, and mispronounced, mumbled or skipped words of the service, to take to Hell to be counted against the offenders.
In his own words,
"I am a poure dyuel, and my name ys Tytyvyllus ... I muste eche day ... brynge my master a thousande pokes full of faylynges, and of neglygences in syllables and wordes."
It can only be assumed that Titillivus’s remit grew astronomically post invention of the printing press. and has to bring extra large contractor bags when he stops by to gather his pokeful from me. Who seem to stay more or less employed despite the typing with mittens effect.