Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
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1800 - 1906 1907 - 1972 1973 - 1979 1980 - 1989 1990 - 2000 philosophie anarchiste French
1800 - 1897 1898 - 1985 1986 - 1991 1992 - 1996 1997 - 2000 philosophie libertaire French

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