The word(s) "thank" appears 70 time(s) in 62 verse(s) in Quran in Muhammad Pickthal translation.

(31) So eat of the lawful and good food which Allah hath provided for you, and thank the bounty of your Lord if it is Him ye serve.

(32) thankful for His bounties; He chose him and He guided him unto a straight path.

(33) And when harm toucheth you upon the sea, all unto whom ye cry (for succour) fail save Him (alone), but when He bringeth you safe to land, ye turn away, for man was ever thankless.

(34) Or feel ye secure that He will not return you to that (plight) a second time, and send against you a hurricane of wind and drown you for your thanklessness, and then ye will not find therein that ye have any avenger against Us?

(35) And We taught him the art of making garments (of mail) to protect you in your daring. Are ye then thankful?

(36) And the camels! We have appointed them among the ceremonies of Allah. Therein ye have much good. So mention the name of Allah over them when they are drawn up in lines. Then when their flanks fall (dead), eat thereof and feed the beggar and the suppliant. Thus have We made them subject unto you, that haply ye may give thanks.

(37) He it is Who hath created for you ears and eyes and hearts. Small thanks give ye!

(38) And He it is Who hath appointed night and day in succession, for him who desireth to remember, or desireth thankfulness.

(39) And (Solomon) smiled, laughing at her speech, and said: My Lord, arouse me to be thankful for Thy favour wherewith Thou hast favoured me and my parents, and to do good that shall be pleasing unto Thee, and include me in (the number of) Thy righteous slaves.

(40) One with whom was knowledge of the Scripture said: I will bring it thee before thy gaze returneth unto thee. And when he saw it set in his presence, (Solomon) said: This is of the bounty of my Lord, that He may try me whether I give thanks or am ungrateful. Whosoever giveth thanks he only giveth thanks for (the good of) his own soul; and whosoever is ungrateful (is ungrateful only to his own soul's hurt). For lo! my Lord is Absolute in independence, Bountiful.