A Real Golfer

A murder has been committed. Police are called to an apartment and find a man standing, holding a 5-iron in his hands, looking at the lifeless body of a woman on the ground.
The detective asks, "Sir, is that your wife?"
"Yes."
"Did you hit her with that golf club?"
"Yes. Yes, I did," the man, answers.
He stifles a sob, drops the club and puts his hands on his head.
"How many times did you hit her?"
"I don't know. Five...maybe six ...put me down for a five."