Google Books Ngram Viewer

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

1800 - 1898 1899 - 1975 1976 - 1983 1984 - 1990 1991 - 2000 focussed English
1800 - 1944 1945 - 1992 1993 - 1995 1996 - 1998 1999 - 2000 focused English

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