Google Books Ngram Viewer

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

1800 - 1850 1851 - 1904 1905 - 1911 1912 - 1983 1984 - 2000 cougar English
1800 - 1850 1851 - 1901 1902 - 1914 1915 - 1975 1976 - 2000 puma English

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