That, of course, is an entirely Reg force created problem: When the RCN decided that every body had to be trained to be a full Bridge Watch-keeping Officer, as opposed to being OK with Minor Warship Watch-keeper, it created a stream where reservists, being mostly available for four months a year, for three, maybe four years in a row at max, could not get all the training (NWO II to NWO V) and the time in service on ships, including the actual frigates, required to qualify. As less and less reserve officers qualified but stayed in to get "time" whenever they could muster a few weeks or a month here and there to get sea time, they accumulated and clogged up the system. Add to that the fact that you have a reduction in available platforms for everyone, including the reg force, and what you get is an ever increasing backlog.
There is, of course, a solution. Get some 600 to 750 tons OPV, lightly armed, with a crew of about 35 and extra room for 12 trainees (6 NWO and 6 other ranks) and designate them as Minor Warship, then make absolutely sure that they are for , and only for, reserve training and employment. the idea here is to generate a whole bunch of officers and engineers (sorry "other" trades in the reserve) that are competent basic mariners to operate these ships while imbued with the naval methods of the RCN, so that if war breaks out or mobilization is required, they can very quickly be brought up to reg force standards to fill the lower levels of the frigates officers and engineers needs, while the reg force personnel gets "promoted up" to fill the higher levels.