"the number of times "1914" is mentioned in the Watchtower...."
According to WT, Gentile Times end in 1914 and everything else WT teaches about WT organization is based upon 1914. --So 1914 teaching is not going away depending on times.
1914
*Sequence of events:
1 End of Gentile times
2 Birth of Kingdom
3 Parousia
4 4 Horsemen of Apocalypse
5 Lat Days
6 Generation
7 Fall of Babylon the Great
8 Appointment of Faithful Steward
9.Preaching
10. END
* Events not necessarily listed in sequential order