The word(s) "grateful" appears 55 time(s) in 47 verse(s) in Quran in Mohsin Khan translation.

(11) Say (O Muhammad صلى الله عليه وسلم): "Who rescues you from the darkness of the land and the sea (dangers like storms), (when) you call upon Him in humility and in secret (saying): If He (Allah) only saves us from this (danger), we shall truly be grateful."

(12) (Allah) said: "O Musa (Moses) I have chosen you above men by My Messages, and by My speaking (to you). So hold that which I have given you and be of the grateful."

(13) It is He Who has created you from a single person (Adam), and (then) He has created from him his wife [Hawwa' (Eve)], in order that he might enjoy the pleasure of living with her. When he (a polytheist from Adam's offspring - as stated by Ibn Kathir in his Tafsir) had sexual relation with her (the polytheist's wife), she became pregnant and she carried it about lightly. Then when it became heavy, they both invoked Allah, their Lord (saying): "If You give us a Salih (good in every aspect) child, we shall indeed be among the grateful."

(14) And remember when you were few and were reckoned weak in the land, and were afraid that men might kidnap you, but He provided a safe place for you, strengthened you with His Help, and provided you with good things so that you might be grateful.

(15) He it is Who enables you to travel through land and sea, till when you are in the ships, and they sail with them with a favourable wind, and they are glad therein, then comes a stormy wind and the waves come to them from all sides, and they think that they are encircled therein. Then they invoke Allah, making their Faith pure for Him Alone, (saying): "If You (Allah) deliver us from this, we shall truly be of the grateful."

(16) And what think those who invent a lie against Allah, on the Day of Resurrection? [i.e. Do they think that they will be forgiven and excused! Nay, they will have an eternal punishment in the Fire of Hell]. Truly, Allah is full of Bounty to mankind, but most of them are ungrateful.

(17) And if We give man a taste of Mercy from Us, and then withdraw it from him, verily! he is despairing, ungrateful.

(18) But if We let him taste good (favour) after evil (poverty and harm) has touched him, he is sure to say: "Ills have departed from me." Surely, he is exultant, and boastful (ungrateful to Allah).

(19) For him (each person), there are angels in succession, before and behind him. They guard him by the Command of Allah. Verily! Allah will not change the (good) condition of a people as long as they do not change their state (of goodness) themselves (by committing sins and by being ungrateful and disobedient to Allah). But when Allah wills a people's punishment, there can be no turning back of it, and they will find besides Him no protector.

(20) And He it is Who has subjected the sea (to you), that you eat thereof fresh tender meat (i.e. fish), and that you bring forth out of it ornaments to wear. And you see the ships ploughing through it, that you may seek (thus) of His Bounty (by transporting the goods from place to place) and that you may be grateful.