Google Books Ngram Viewer

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

1800 - 1972 1973 - 1995 1996 - 1997 1998 - 1999 2000 rec room English
1800 - 1945 1946 - 1956 1957 - 1959 1960 - 1987 1988 - 2000 rumpus room English

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