is there a way?
IO think the best way is to see general stats for document (Tools > Words counter) within some time span (like 12hrs or sth) and compare it with previous values.
This might interest you:
It hasn’t been updated for a while, and I have not tested it extensively, but it seems to work (LO 5.3.3, Kubuntu 16.04).
It shows progress toward a target word count for the session. You might also like this blog entry on using targets for session wordcounts: http://thisblogisaploy.blogspot.com.au/2011/06/how-i-went-from-writing-2000-words-day.html