Google Books Ngram Viewer

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

1800 - 1820 1821 - 1860 1861 - 1865 1866 - 1892 1893 - 1900 slavery English
1800 - 1853 1854 - 1889 1890 - 1893 1894 - 1897 1898 - 1900 railroad English
1800 - 1815 1816 - 1858 1859 - 1865 1866 - 1891 1892 - 1900 cotton English
1800 - 1829 1830 - 1861 1862 - 1863 1864 - 1894 1895 - 1900 secession English

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