If you scroll to the bottom of the timetable, you'll see "Vehicles" (or you can add it to the end of the timetable webpage, so
https://bustimes.org/services/66-keighley-cross-hills-skipton/vehicles). That will show you all the journeys of the day.
By changing the date field at the top, you can go back as far as the site keeps data for (it is cleared occasionally) - the last two or three weeks are usually available.
The allocation this week appears to have consistently been two doubles and a single.