top10000de.txt, top10000en.txt: List of most frequent {German, English} words 
from http://wortschatz.uni-leipzig.de/html/wliste.html

deutsch-t.txt.1, englisch-t.txt.1  Letter frequencies 
deutsch-t.txt.2, englisch-t.txt.2  Bigram frequencies
collected by AdNW project https://sites.google.com/site/ausderneowelt/Optimierer.tar.gz
(package contains description of corpus sources)

wl-deutsch.txt, wl-englisch.txt word frequencies collected from same sources
http://adnw.de/uploads/Main/Downloads/wortlisten.tar.gz


