The word(s) "heavy" appears 19 time(s) in 18 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) And they carry your heavy loads to lands that ye could not (otherwise) reach except with souls distressed: for your Lord is indeed Most Kind, Most Merciful,

(12) Or do ye feel secure that He will not send you back a second time to sea and send against you a heavy gale to drown you because of your ingratitude, so that ye find no helper. Therein against Us?

(13) For them will be Gardens of Eternity; beneath them rivers will flow; they will be adorned therein with bracelets of gold, and they will wear green garments of fine silk and heavy brocade: They will recline therein on raised thrones. How good the recompense! How beautiful a couch to recline on!

(14) Then those whose balance (of good deeds) is heavy,- they will attain salvation:

(15) And those that lift and bear away heavy weights;

(16) But Pharaoh disobeyed the messenger; so We seized him with a heavy Punishment.

(17) Upon them will be green Garments of fine silk and heavy brocade, and they will be adorned with Bracelets of silver; and their Lord will give to them to drink of a Wine Pure and Holy.

(18) Then, he whose balance (of good deeds) will be (found) heavy,