Google Books Ngram Viewer

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

1700 - 1808 1809 - 1964 1965 - 1977 1978 - 1990 1991 - 2000 rechtschreibung German
1700 - 1804 1805 - 1879 1880 - 1893 1894 - 1990 1991 - 2000 orthographie German

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