Google Books Ngram Viewer

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

1827 1828 - 1841 1842 - 1843 1844 - 1858 1859 - 1867 i doubt there is English
1827 - 1839 1840 - 1861 1862 - 1863 1864 1865 - 1867 i doubt if there is English
1827 - 1831 1832 - 1859 1860 - 1862 1863 - 1864 1865 - 1867 i doubt whether there is English
1827 - 1835 1836 - 1863 1864 1865 - 1866 1867 i doubt that there is English

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