The parsing of contractions/words with apostrophes is broken/unsupported: http://ngrams.googlelabs.com/graph?content=can%27t%2Ccouldn%27t%2Cwouldn%27t%2Cshould

The parsing of contractions/words with apostrophes is broken/unsupported: http://ngrams.googlelabs.com/graph?content=can%27t%2Ccouldn%27t%2Cwouldn%27t%2Cshouldn%27t%2Cdon%27t&year_start=1900&year_end=2008&corpus=0&smoothing=0 http://ngrams.googlelabs.com/graph?content=can%27t%2Ccouldn%... vs http://ngrams.googlelabs.com/graph?content=t%2Ccan%27t%2Ccouldn%27t%2Cwouldn%27t%2Cshouldn%27t%2Cdon%27t&year_start=1900&year_end=2008&corpus=0&smoothing=0 http://ngrams.googlelabs.com/graph?content=t%2Ccan%27t%2Ccou...