There is still no correlation to hours/missions flown nor does it distinguish between accidents resulting from engine failure and other causes
Correlation to hours or missions flown is rather pointless, it depends on the use to which the aircraft is being put. An R-22 doing an hour of endless autos with a student is far higher up the risk scale than a 206 used for commuting, or indeed a R-22 used for commuting. Figures I quoted in an earlier post cite engine failure being responsible for 16.7% of ALL accidents.