Google Books Ngram Viewer

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

1800 - 1879 1880 - 1983 1984 - 1990 1991 - 1995 1996 - 2000 on par English
1800 - 1834 1835 - 1947 1948 - 1963 1964 - 1980 1981 - 2000 on a par English

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