I'm not sure what you mean by recurrent training? and I think you have a couple of things mixed together, but here's my two-penn'orth...
In UK, to remain current (and reasonably competent) on a single type an LAE must be able to show at least 6 months experience on that type in the last two years. However, in the past I have seen the rules bent with agreement from national authorities. I am not sure if the rules would be as bent in todays environment of ticking boxes.
Continuation Training, in which the LAE should be updated with the latest mods installed and techniques or processes a particular company wishes to promote, should, coincidentally, be conducted every two years.
Hope this helps?