Google Books Ngram Viewer

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

1800 - 1830 1831 - 1912 1913 - 1928 1929 - 1980 1981 - 2000 incident English
1800 - 1823 1824 - 1878 1879 - 1894 1895 - 1976 1977 - 2000 incidents English
1800 - 1890 1891 - 1980 1981 - 1986 1987 - 1993 1994 - 2000 incidence English
1800 - 1844 1845 - 1975 1976 - 1978 1979 - 1994 1995 - 2000 incidences English

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