I assured him, "how extremely desirous I was that he should be satisfied on every point; but I doubted much, whether it would be possible for me to explain myself on several subjects, whereof his honour could have no conception; because I saw nothing in his country to which I could resemble them; that, however, I would do my best, and strive to express myself by similitudes, humbly desiring his assistance when I wanted proper words;" which he was pleased to promise me.
There are no more uses of "similitude" in the book.
Show samples from other sources
People are drawn to communities of similitude.
the dream had too much similitude of the fact
Daniel Defoe -- The Further Adventures of Robinson Crusoe