Google Books Ngram Viewer

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

1800 - 1832 1833 - 1846 1847 - 1858 1859 - 1954 1955 - 2000 trackless wilderness English
1800 - 1802 1803 1804 - 1918 1919 - 1954 1955 - 1975 tractless wilderness English

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