Google Books Ngram Viewer

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

1800 - 1898 1899 - 1903 1904 - 1906 1907 - 1992 1993 - 2008 ich habe dich lieb German
1800 - 1816 1817 - 1910 1911 - 1924 1925 - 2001 2002 - 2008 ich liebe dich German

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