Google Books Ngram Viewer

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

1988 - 1999 2000 - 2005 2006 2007 2008 ubiquitous computing English
1988 - 2001 2002 - 2005 2006 2007 2008 pervasive computing English
1988 - 2000 2001 - 2005 2006 2007 2008 context awareness English

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