Google Books Ngram Viewer

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

1780 - 1884 1885 - 1948 1949 - 1952 1953 - 1992 1993 - 2008 tupac amaru Spanish

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