Most days? In the summer period they were very prevalent on the Chatham mainline specials yes, but beyond that they were/are limited to the following I can recall:
- Dover Priory and Canterbury East services (stopper to Medway, semi-fast to Dover and vice-versa): 465/9+466 on some midweek services, lone 465 (although I have seen 2x before) on one of 5 sets on Saturdays. For Canterbury East the last 2 services of the day stops short at CBE, again 465/9+466, and one allocation on Sundays when engineering works actually allow any mainline services to run full length. There is also one CST-FAV 6 car peak working that is non-stop to Rochester.
- Sheerness two peak workings each way of 6 car, but otherwise everything else Networker based stops short at Rochester or Gillingham, while nothing regular is typically 10 car and/or goes along the Thanet coast.
Unless of course things have changed in the current climate that I haven't seen (I'm happy to be corrected if this is the case).