But at last she said: ’Lords, you are weary and shall now go to your beds with such ease as can be contrived in haste.
Ill deeds have been done here; but let now all enmity that lies between you be put away, for it was contrived by the Enemy and works his will.
’There is some good stone-work here,’ he said as he looked at the walls; ’but also some that is less good, and the streets could be better contrived.
Therefore Aragorn now set the host in such array as could best be contrived; and they were drawn up on two great hills of blasted stone and earth that orcs had piled in years of labour.
And now he shall endure the slow torment of years, as long and slow as our arts in the Great Tower can contrive, and never be released, unless maybe when he is changed and broken, so that he may come to you, and you shall see what you have done.
There are no more uses of "contrived" in the book.