Google Books Ngram Viewer

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

1800 - 1807 1808 - 1834 1835 - 1843 1844 - 1903 1904 - 2000 singular phenomenon English
1800 - 1809 1810 - 1832 1833 - 1838 1839 - 1901 1902 - 2000 singular phenomena English
1800 - 1806 1807 - 1814 1815 - 1820 1821 - 1961 1962 - 2000 singular event English
1800 - 1805 1806 - 1812 1813 - 1819 1820 - 1967 1968 - 2000 singular events English

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