Change popular-phrase API method to use ngram model
Change popular-phrase API method to use ngram model

sunlightlabs/Capitol-Words,sunlightlabs/Capitol-Words,propublica/Capitol-Words,propublica/Capitol-Words,sunlightlabs/Capitol-Words,sunlightlabs/Capitol-Words,propublica/Capitol-Words,sunlightlabs/Capitol-Words,sunlightlabs/Capitol-Words,sunlightlabs/Capitol-Words,propublica/Capitol-Words