A man who premeditates such a crime is silent and keeps it to himself.
Smerdyakov was always inquiring, putting certain indirect but obviously premeditated questions, but what his object was he did not explain, and usually at the most important moment he would break off and relapse into silence or pass to another subject.
And, in fact, from that letter we see that the whole fact of the murder was premeditated.
He was not running to carry out a program, to carry out what he had written, that is, not for an act of premeditated robbery, but he ran suddenly, spontaneously, in a jealous fury.
There are no more uses of "premeditated" in the book.