Google Books Ngram Viewer

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

1800 - 1821 1822 - 1894 1895 - 1908 1909 - 1986 1987 - 2008 stiefmütterlich German
1800 - 1823 1824 - 1848 1849 - 1855 1856 - 1987 1988 - 2008 stiefväterlich German
1800 - 1841 1842 - 1905 1906 - 1917 1918 - 1987 1988 - 2008 stiefmütterlich behandelt German
1800 - 1830 1831 - 1844 1845 1846 - 1994 1995 - 2008 stiefväterlich behandelt German

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