Google Books Ngram Viewer

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

1950 - 1963 1964 - 1989 1990 - 1993 1994 - 1997 1998 - 2000 freeway English
1950 - 1953 1954 - 1965 1966 - 1969 1970 - 1995 1996 - 2000 turnpike English

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