Google Books Ngram Viewer

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

1950 - 1953 1954 - 1986 1987 - 1990 1991 - 1994 1995 - 2000 he swung English
1950 - 1958 1959 - 1982 1983 - 1984 1985 - 1993 1994 - 2000 he swang English

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