Google Books Ngram Viewer

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

1950 - 1985 1986 - 1992 1993 1994 - 2003 2004 - 2008 single tasking English
1950 - 1970 1971 - 1989 1990 - 1992 1993 - 2002 2003 - 2008 sequential processing English
1950 - 1973 1974 - 1991 1992 - 1994 1995 - 2002 2003 - 2008 serial processing English

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