Google Books Ngram Viewer

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

1900 - 1919 1920 - 1924 1925 1926 - 1967 1968 - 1972 war Chinese
1900 - 1919 1920 - 1924 1925 1926 - 1967 1968 - 1992 oil Chinese

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