Google Books Ngram Viewer

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

1800 - 1938 1939 - 1955 1956 - 1958 1959 - 1983 1984 - 2000 punch card English

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