Google Books Ngram Viewer

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

1920 - 1967 1968 - 1996 1997 1998 1999 - 2000 tofu English
1920 - 1937 1938 - 1988 1989 - 1992 1993 - 1996 1997 - 2000 hot dog English

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