Google Ngram Viewer (German)
Trigger: !ngramsde
Try it
URL pattern: https://books.google.com/ngrams/graph?content=query&year_start=1800&year_end=2000&corpus=20&smoothing=3
Searches books.google.com, filed under Google.
Trigger: !ngramsde
URL pattern: https://books.google.com/ngrams/graph?content=query&year_start=1800&year_end=2000&corpus=20&smoothing=3
Searches books.google.com, filed under Google.