Google Books Ngram Viewer

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

1800 - 1816 1817 - 1847 1848 - 1862 1863 - 1967 1968 - 2000 zweifel German
1800 - 1814 1815 - 1828 1829 - 1880 1881 - 1978 1979 - 2000 hoffnung German

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