Google Books Ngram Viewer

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

1800 - 1827 1828 - 1873 1874 - 1883 1884 - 1987 1988 - 2008 pope clement i English
1800 - 1828 1829 - 1876 1877 - 1885 1886 - 1968 1969 - 2008 clement of rome English

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