Google Books Ngram Viewer

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

1920 - 1970 1971 - 1994 1995 - 1996 1997 - 1998 1999 - 2000 racism English
1920 - 1977 1978 - 1994 1995 - 1996 1997 - 1998 1999 - 2000 sexism English
1920 - 1979 1980 - 1995 1996 1997 1998 - 2000 classism English
1920 - 1979 1980 - 1995 1996 - 1997 1998 - 1999 2000 ageism English
1920 - 1982 1983 - 1994 1995 1996 - 1998 1999 - 2000 speciesism English
1920 - 1986 1987 - 1997 1998 1999 2000 homophobia English

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