Google Books Ngram Viewer

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

1800 - 1831 1832 - 1989 1990 1991 - 1998 1999 - 2000 pi fonts English
1800 - 1931 1932 - 1993 1994 1995 - 1999 2000 dingbats English
1800 - 1984 1985 - 1994 1995 1996 - 1998 1999 - 2000 symbol fonts English

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