[devilant]

Jeff used a rhetorical device called hyperbole. He does not literally kill a child multiple times each day.

[shrikant]

Also, as long as we're being literal about everything, it would be impossible to kill a child (or anything else..) multiple times.

[Anderkent]

The 'multiple times' annotates occurrence of desire, not the subject of desire. He doesn't "want to kill him many times", but many times a day he "wants to kill him".