Google Books Ngram Viewer

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

1800 - 1986 1987 - 1997 1998 1999 2000 echoey room English
1800 - 1934 1935 - 1948 1949 - 1952 1953 - 1987 1988 - 2000 reverberant room English

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