         Sentence 1:          low often do trains journey to Kings Cross?    Sentence 2: Train operator Virgin Trains East Coast  provides a half-hourly frequency of trains to London Kings.  Cross, with a journey time of about three hours, these  services call at Durham, Darlington, York, Doncaster,  Newark North Gate and Peterborough and north to  Scotland with all trains calling at Edinburgh and a small  number of trains extended to Glasgow, Aberdeen and  Inverness.