Google Books Ngram Viewer

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

1800 - 1910 1911 - 1935 1936 - 1943 1944 - 1989 1990 - 2000 kaiser wilhelm English
1800 - 1890 1891 - 1914 1915 - 1917 1918 - 1950 1951 - 2000 emperor william English

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