We manage the budget in two ways. We estimate an average of 17 days of training for each individual, but on top of that, we also plan quite robust regional and national-level exercises or training events that will draw in folks from multiple units. In other words, there's training at the unit level that we budget for, the 17 days, but then there are a significant number of events above and beyond that, which people can volunteer for in order to keep up their readiness levels.
Evidence of meeting #37 for National Defence in the 42nd Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was training.
A recording is available from Parliament.