Google Books Ngram Viewer

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

1800 - 1815 1816 - 1833 1834 - 1851 1852 - 1977 1978 - 2000 universal language English
1800 - 1815 1816 - 1957 1958 - 1970 1971 - 1984 1985 - 2000 artificial language English
1800 - 1815 1816 - 1866 1867 - 1882 1883 - 1989 1990 - 2000 invented language English
1800 - 1850 1851 - 1943 1944 - 1948 1949 - 1975 1976 - 2000 constructed language English

Run your own experiment! Raw data is available for download here.
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