BUSES

Set to 4 different clues across 4 published puzzles, most often “Greyhounds, e.g.” — The New York Times, Tuesday, 12 April 2011.

5 letters

Every clue on record, most used first

Greyhounds, e.g.once
The New York Times — Tuesday, 12 April 2011
Mass transit vehiclesonce
The New York Times — Monday, 1 July 2002
They go from station to stationonce
The New York Times — Saturday, 18 September 1999
Double-deckers, e.g.once
The New York Times — Tuesday, 16 December 1997