Google Books Ngram Viewer

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

1800 - 1812 1813 - 1828 1829 - 1838 1839 - 1935 1936 - 2000 supposed origin English
1800 - 1815 1816 - 1826 1827 - 1836 1837 - 1942 1943 - 2000 supposed power English
1800 - 1827 1828 - 1843 1844 - 1857 1858 - 1980 1981 - 2000 putative father English
1800 - 1824 1825 - 1969 1970 - 1978 1979 - 1989 1990 - 2000 putative fathers English
1800 - 1865 1866 - 1940 1941 - 1945 1946 - 1988 1989 - 2000 putative marriage English
1800 - 1855 1856 - 1955 1956 - 1968 1969 - 1992 1993 - 2000 putative author English
1800 - 1976 1977 - 1988 1989 - 1990 1991 - 1995 1996 - 2000 putative neurotransmitters English
1800 - 1814 1815 - 1921 1922 - 1930 1931 - 1981 1982 - 2000 putative son English
1800 - 1961 1962 - 1991 1992 - 1993 1994 - 1996 1997 - 2000 putative spouse English
1800 - 1859 1860 - 1956 1957 - 1960 1961 - 1981 1982 - 2000 putative parents English
1800 - 1977 1978 - 1994 1995 - 1996 1997 - 1998 1999 - 2000 putative role English
1800 - 1885 1886 - 1924 1925 - 1930 1931 - 1977 1978 - 2000 putative wife English

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