Google Books Ngram Viewer

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

Ngrams not found: friend of Peter's, [friend of Peter's]

Search in Google Books:

1800 - 1840 1841 - 1883 1884 - 1896 1897 - 1972 1973 - 2000 friend of peter English

Run your own experiment! Raw data is available for download here.
© 2013 Google - Privacy & Terms - About Google - About Google Books - About Ngram Viewer