Google Books Ngram Viewer

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

1800 - 1942 1943 - 1992 1993 - 1995 1996 - 1998 1999 - 2000 keep an ear out English
1800 - 1917 1918 - 1988 1989 - 1993 1994 - 1997 1998 - 2000 keep an eye out English

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