I don't fly singles any more, but when I did, we did lots of autos at every recurrent training session. We did them until we were comfortable and the check pilot was comfortable with us, and usually we did a few more than he required, just for the fun of it. The last time I did a full auto to the ground was in an S76. We usually only do single-engine failures at recurrent, but in transition checkouts and occasionally other times we get a full auto in a twin.