Google Books Ngram Viewer

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

1950 - 1971 1972 - 1993 1994 - 1995 1996 - 2004 2005 - 2008 and wala English
1950 - 1951 1952 - 1964 1965 - 1966 1967 - 2001 2002 - 2008 and wallah English

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