Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
Search in Google Books:

1500 - 1768 1769 - 1770 1771 - 1804 1805 - 1917 1918 - 2008 rhabarber German

Run your own experiment! Raw data is available for download here.
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