different between fagging vs gagging

English

fagging

fagging (countable and uncountable, plural faggings)

(Britain, historical, education) The system in boarding schools whereby younger students acted as servants for older students.
- 1841, The English Journal (volume 1, page 222)
  We are happy we never had anything to do with faggings and floggings. We can well remember the terrific impression they made on our mind, as our friends were afflicted by them.
- 1922, Alexander McConnell, William Revell Moody, Arthur Percy Fitt, Record of Christian Work (volume 41, page 343)
  The public schoolboy is taught to bear whippings and faggings without murmuring.

From gag +? -ing.

gagging

gagging (plural gaggings)

A gag motion or reflex.
- 1973, Oliver Sacks, Awakenings
  She was restarted on L-DOPA later, in the middle of July, and this time the tongue-pulsions and gaggings were not evoked at all, but, on the contrary, a striking improvement occurred.

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