Google Books Ngram Viewer

Graph these comma-separated phrases:
case-insensitive
between and from the corpus with smoothing of .  
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1800 - 1902 1903 - 1976 1977 - 1982 1983 - 1990 1991 - 2000 anarquismo Spanish
1800 - 1948 1949 - 1985 1986 - 1989 1990 - 1994 1995 - 2000 marxismo Spanish

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