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<iframe name="ngram_chart" src="https://books.google.com/ngrams/interactive_chart?content=mathematics,chemistry,physics,biology&year_start=1800&year_end=2008&corpus=15&smoothing=3&share=" width=900 height=500 marginwidth=0 marginheight=0 hspace=0 vspace=0 frameborder=0 scrolling=no></iframe>
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1800
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2008
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English (2012)
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2012
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mathematics
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1800 - 1834
1835 - 1953
1954 - 1965
1966 - 1994
1995 - 2008
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chemistry
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1800 - 1832
1833 - 1960
1961 - 1975
1976 - 1991
1992 - 2008
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physics
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1800 - 1871
1872 - 1952
1953 - 1962
1963 - 1994
1995 - 2008
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biology
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1800 - 1912
1913 - 1985
1986 - 1993
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2001 - 2008
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