Google Books Ngram Viewer

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

1880 - 1911 1912 - 1917 1918 - 1919 1920 - 1966 1967 - 2000 aeroplane English
1880 - 1930 1931 - 1942 1943 - 1944 1945 - 1991 1992 - 2000 airplane English

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