The word(s) "whenever" appears 13 time(s) in 13 verse(s) in Quran in Mohsin Khan translation.

(11) And he whom Allah guides, he is led aright; but he whom He sends astray, for such you will find no Auliya' (helpers and protectors), besides Him, and We shall gather them together on the Day of Resurrection on their faces, blind, dumb and deaf; their abode will be Hell; whenever it abates, We shall increase for them the fierceness of the Fire.

(12) And among His Ayat (proofs, evidence, lessons, signs, etc.) is the creation of the heavens and the earth, and whatever moving (living) creatures He has dispersed in them both. And He is All-Potent over their assembling (i.e. resurrecting them on the Day of Resurrection after their death, and dispersion of their bodies) whenever He wills.

(13) And, whenever they passed by them, used to wink one to another (in mockery).